MML F/COLLEGE MAT F/TRADES - ACCESS CODE
MML F/COLLEGE MAT F/TRADES - ACCESS CODE
10th Edition
ISBN: 9781323845967
Author: Hobbs
Publisher: PEARSON
bartleby

Videos

Question
Book Icon
Chapter 15.2, Problem 10E
To determine

To solve: The equation 9x2=12x by factoring.

Blurred answer
Students have asked these similar questions
3. Consider the sequences of functions f₁: [-π, π] → R, sin(n²x) An(2) n f pointwise as (i) Find a function ƒ : [-T,π] → R such that fn n∞. Further, show that fn →f uniformly on [-π,π] as n → ∞. [20 Marks] (ii) Does the sequence of derivatives f(x) has a pointwise limit on [-7, 7]? Justify your answer. [10 Marks]
Can you prove this integral equation?Note: It also has an application to prove that 22/7 > π.
2. An experiment is set up to test the effectiveness of a new drug for balancing people's mood. The table below contains the results of the patients before and after taking the drug. The possible scores are the integers from 0 to 10, where 0 indicates a depressed mood and 10 indicates and elated mood. Patient Before After 1 4 4 2 3 3 3 6 4 4 1 2 5 6 5 6 1 3 7 4 7 8 6 9 1 4 10 5 4 Assuming the differences of the observations to be symmetric, but not normally distributed, investigate the effectiveness of the drug at the 5% significance level. [4 Marks]

Chapter 15 Solutions

MML F/COLLEGE MAT F/TRADES - ACCESS CODE

Ch. 15.1 - Prob. 10ECh. 15.1 - Prob. 11ECh. 15.1 - Prob. 12ECh. 15.1 - Prob. 13ECh. 15.1 - Prob. 14ECh. 15.1 - Prob. 15ECh. 15.1 - Prob. 16ECh. 15.1 - Write each equation in standard form and identify...Ch. 15.1 - Prob. 18ECh. 15.1 - Prob. 19ECh. 15.1 - Prob. 20ECh. 15.1 - Prob. 21ECh. 15.1 - Prob. 22ECh. 15.1 - Prob. 23ECh. 15.1 - Prob. 24ECh. 15.1 - Prob. 25ECh. 15.1 - Prob. 26ECh. 15.1 - Prob. 27ECh. 15.1 - Prob. 28ECh. 15.1 - Prob. 29ECh. 15.1 - Prob. 30ECh. 15.1 - Prob. 31ECh. 15.1 - Prob. 32ECh. 15.1 - Prob. 33ECh. 15.1 - Prob. 34ECh. 15.1 - Prob. 35ECh. 15.1 - Prob. 36ECh. 15.1 - Prob. 37ECh. 15.1 - Prob. 38ECh. 15.1 - Prob. 39ECh. 15.1 - Prob. 40ECh. 15.1 - Prob. 41ECh. 15.1 - Prob. 42ECh. 15.1 - Prob. 43ECh. 15.1 - Prob. 44ECh. 15.1 - Prob. 45ECh. 15.1 - Prob. 46ECh. 15.1 - Prob. 47ECh. 15.2 - Factor 10x2 − 15x for x. Ch. 15.2 - Factor 3x2 + 7x − 6 for x. Ch. 15.2 - Solve by factoring. Ch. 15.2 - Prob. 2ECh. 15.2 - Prob. 3ECh. 15.2 - Prob. 4ECh. 15.2 - Prob. 5ECh. 15.2 - Prob. 6ECh. 15.2 - Prob. 7ECh. 15.2 - Prob. 8ECh. 15.2 - Prob. 9ECh. 15.2 - Prob. 10ECh. 15.2 - Prob. 11ECh. 15.2 - Prob. 12ECh. 15.2 - Prob. 13ECh. 15.2 - Prob. 14ECh. 15.2 - Prob. 15ECh. 15.2 - Prob. 16ECh. 15.2 - Prob. 17ECh. 15.2 - Solve the equations by factoring. Ch. 15.2 - Prob. 19ECh. 15.2 - Prob. 20ECh. 15.2 - Prob. 21ECh. 15.2 - Prob. 22ECh. 15.2 - Prob. 23ECh. 15.2 - Prob. 24ECh. 15.2 - Prob. 25ECh. 15.2 - Prob. 26ECh. 15.2 - Prob. 27ECh. 15.2 - Prob. 28ECh. 15.2 - Prob. 29ECh. 15.2 - Prob. 30ECh. 15.2 - Prob. 31ECh. 15.2 - Prob. 32ECh. 15.2 - Prob. 33ECh. 15.2 - Prob. 34ECh. 15.2 - Prob. 35ECh. 15.2 - Prob. 36ECh. 15.2 - Prob. 37ECh. 15.2 - Prob. 38ECh. 15.2 - Prob. 39ECh. 15.2 - Prob. 40ECh. 15.2 - Prob. 41ECh. 15.2 - Prob. 42ECh. 15.3 - Expand . Ch. 15.3 - Prob. 1ECh. 15.3 - Prob. 2ECh. 15.3 - Prob. 3ECh. 15.3 - Prob. 4ECh. 15.3 - Prob. 5ECh. 15.3 - Prob. 6ECh. 15.3 - Prob. 7ECh. 15.3 - Prob. 8ECh. 15.3 - Prob. 9ECh. 15.3 - Prob. 10ECh. 15.3 - Prob. 11ECh. 15.3 - Prob. 12ECh. 15.3 - Prob. 13ECh. 15.3 - Prob. 14ECh. 15.3 - Prob. 15ECh. 15.3 - Prob. 16ECh. 15.3 - Prob. 17ECh. 15.3 - Prob. 18ECh. 15.3 - Prob. 19ECh. 15.3 - Prob. 20ECh. 15.3 - Prob. 21ECh. 15.3 - Prob. 22ECh. 15.3 - Prob. 23ECh. 15.3 - Prob. 24ECh. 15.3 - Prob. 25ECh. 15.3 - Prob. 26ECh. 15.3 - Prob. 27ECh. 15.3 - Prob. 28ECh. 15.3 - Prob. 29ECh. 15.3 - Prob. 30ECh. 15.3 - Prob. 31ECh. 15.3 - Prob. 32ECh. 15.3 - Prob. 33ECh. 15.3 - Prob. 34ECh. 15.3 - Prob. 35ECh. 15.3 - Prob. 36ECh. 15.4 - Prob. 1LCCh. 15.4 - Prob. 1ECh. 15.4 - Prob. 2ECh. 15.4 - Prob. 3ECh. 15.4 - Prob. 4ECh. 15.4 - Prob. 5ECh. 15.4 - Prob. 6ECh. 15.4 - Prob. 7ECh. 15.4 - Prob. 8ECh. 15.4 - Prob. 9ECh. 15.4 - Prob. 10ECh. 15.4 - Prob. 11ECh. 15.4 - Prob. 12ECh. 15.4 - Prob. 13ECh. 15.4 - Prob. 14ECh. 15.4 - Prob. 15ECh. 15.4 - Prob. 16ECh. 15.4 - Prob. 17ECh. 15.4 - Prob. 18ECh. 15.4 - Prob. 19ECh. 15.4 - Prob. 20ECh. 15.4 - Prob. 21ECh. 15.4 - Prob. 22ECh. 15.4 - Prob. 23ECh. 15.4 - Prob. 24ECh. 15.4 - Prob. 25ECh. 15.4 - Prob. 26ECh. 15.4 - Prob. 27ECh. 15.4 - Prob. 28ECh. 15.4 - Prob. 29ECh. 15.4 - Prob. 30ECh. 15.4 - Prob. 31ECh. 15.4 - Prob. 32ECh. 15.5 - Prob. 1LCCh. 15.5 - Prob. 2LCCh. 15.5 - Prob. 3LCCh. 15.5 - Prob. 1ECh. 15.5 - Prob. 2ECh. 15.5 - Prob. 3ECh. 15.5 - Prob. 4ECh. 15.5 - Prob. 5ECh. 15.5 - Prob. 6ECh. 15.5 - Prob. 7ECh. 15.5 - Prob. 8ECh. 15.5 - Prob. 9ECh. 15.5 - Prob. 10ECh. 15.5 - Prob. 11ECh. 15.5 - Prob. 12ECh. 15.5 - Prob. 13ECh. 15.5 - Prob. 14ECh. 15.5 - Prob. 15ECh. 15.5 - Prob. 16ECh. 15.5 - Prob. 17ECh. 15.5 - Prob. 18ECh. 15.5 - Prob. 19ECh. 15.5 - Prob. 20ECh. 15.5 - Prob. 21ECh. 15.5 - Prob. 22ECh. 15.5 - Prob. 23ECh. 15.5 - Prob. 24ECh. 15.5 - Prob. 25ECh. 15.5 - Prob. 26ECh. 15.5 - Prob. 27ECh. 15.5 - Prob. 28ECh. 15.5 - Prob. 29ECh. 15.5 - Prob. 30ECh. 15.5 - Find the domain and range of the functions or...Ch. 15.5 - Prob. 32ECh. 15.5 - Prob. 33ECh. 15.5 - Find the domain and range of the functions or...Ch. 15.5 - Prob. 35ECh. 15.5 - Find the domain and range of the functions or...Ch. 15.6 - Prob. 1LCCh. 15.6 - Prob. 1ECh. 15.6 - Prob. 2ECh. 15.6 - Prob. 3ECh. 15.6 - Prob. 4ECh. 15.6 - Prob. 5ECh. 15.6 - Prob. 6ECh. 15.6 - Prob. 7ECh. 15.6 - Prob. 8ECh. 15.6 - Prob. 9ECh. 15.6 - Prob. 10ECh. 15.6 - Prob. 11ECh. 15.6 - Prob. 12ECh. 15.6 - Prob. 13ECh. 15.6 - Prob. 14ECh. 15.6 - Prob. 15ECh. 15.6 - Prob. 16ECh. 15.6 - Prob. 17ECh. 15.6 - Prob. 18ECh. 15.7 - Prob. 1LCCh. 15.7 - Prob. 1ECh. 15.7 - Prob. 2ECh. 15.7 - Prob. 3ECh. 15.7 - Prob. 4ECh. 15.7 - Prob. 5ECh. 15.7 - Prob. 6ECh. 15.7 - Prob. 7ECh. 15.7 - Prob. 8ECh. 15.7 - Prob. 9ECh. 15.7 - Prob. 10ECh. 15.7 - Prob. 11ECh. 15.7 - Prob. 12ECh. 15.7 - Prob. 13ECh. 15.7 - Prob. 14ECh. 15.7 - Prob. 15ECh. 15.7 - Prob. 16ECh. 15.7 - Prob. 17ECh. 15.7 - Prob. 18ECh. 15.7 - Prob. 19ECh. 15.7 - Prob. 20ECh. 15.7 - Prob. 21ECh. 15.7 - Prob. 22ECh. 15.7 - Prob. 23ECh. 15.7 - Prob. 24ECh. 15.7 - Prob. 25ECh. 15.7 - Prob. 26ECh. 15.7 - Prob. 27ECh. 15.7 - Prob. 28ECh. 15.7 - Prob. 29ECh. 15.7 - Prob. 30ECh. 15.7 - Prob. 31ECh. 15.7 - Prob. 32ECh. 15.7 - Prob. 33ECh. 15.7 - Prob. 34ECh. 15.7 - Find the solution set for each inequality. Graph...Ch. 15.7 - Prob. 36ECh. 15.7 - Prob. 37ECh. 15.7 - Prob. 38ECh. 15.7 - Prob. 39ECh. 15.7 - Prob. 40ECh. 15.7 - Prob. 41ECh. 15.7 - Prob. 42ECh. 15.7 - Prob. 43ECh. 15.7 - Prob. 44ECh. 15.7 - Prob. 45ECh. 15.7 - Prob. 46ECh. 15.7 - Prob. 47ECh. 15.7 - Prob. 48ECh. 15.7 - Prob. 49ECh. 15.7 - Prob. 50ECh. 15.7 - Prob. 51ECh. 15.7 - Prob. 52ECh. 15.7 - Prob. 53ECh. 15.7 - Prob. 54ECh. 15.7 - Prob. 55ECh. 15.7 - Prob. 56ECh. 15.7 - Prob. 57ECh. 15.7 - Prob. 58ECh. 15.7 - Prob. 59ECh. 15.7 - Prob. 60ECh. 15.7 - Prob. 61ECh. 15.7 - Prob. 62ECh. 15.7 - Prob. 63ECh. 15.7 - Prob. 64ECh. 15.7 - Prob. 65ECh. 15.7 - Prob. 66ECh. 15.7 - Prob. 67ECh. 15.7 - Prob. 68ECh. 15.7 - Prob. 69ECh. 15.7 - Prob. 70ECh. 15 - Prob. 1RECh. 15 - Prob. 2RECh. 15 - Prob. 3RECh. 15 - Prob. 4RECh. 15 - Prob. 5RECh. 15 - Prob. 6RECh. 15 - Prob. 7RECh. 15 - Prob. 8RECh. 15 - Prob. 9RECh. 15 - Prob. 10RECh. 15 - Prob. 11RECh. 15 - Prob. 12RECh. 15 - Prob. 13RECh. 15 - Prob. 14RECh. 15 - Prob. 15RECh. 15 - Prob. 16RECh. 15 - Prob. 17RECh. 15 - Prob. 18RECh. 15 - Prob. 19RECh. 15 - Prob. 20RECh. 15 - Solve the equations by the square-root method....Ch. 15 - Prob. 22RECh. 15 - Prob. 23RECh. 15 - Prob. 24RECh. 15 - Prob. 25RECh. 15 - Prob. 26RECh. 15 - Prob. 27RECh. 15 - Prob. 28RECh. 15 - Prob. 29RECh. 15 - Prob. 30RECh. 15 - Prob. 31RECh. 15 - Prob. 32RECh. 15 - Prob. 33RECh. 15 - Prob. 34RECh. 15 - Prob. 35RECh. 15 - Prob. 36RECh. 15 - Prob. 37RECh. 15 - Prob. 38RECh. 15 - Prob. 39RECh. 15 - Prob. 40RECh. 15 - Prob. 41RECh. 15 - Prob. 42RECh. 15 - Prob. 43RECh. 15 - Prob. 44RECh. 15 - Prob. 45RECh. 15 - Prob. 46RECh. 15 - Prob. 47RECh. 15 - Prob. 48RECh. 15 - Prob. 49RECh. 15 - Prob. 50RECh. 15 - Prob. 51RECh. 15 - Prob. 52RECh. 15 - Prob. 53RECh. 15 - Prob. 54RECh. 15 - Prob. 55RECh. 15 - Prob. 56RECh. 15 - Prob. 57RECh. 15 - Prob. 58RECh. 15 - Prob. 59RECh. 15 - Prob. 60RECh. 15 - Prob. 61RECh. 15 - Prob. 62RECh. 15 - Prob. 63RECh. 15 - Prob. 64RECh. 15 - Prob. 65RECh. 15 - Prob. 66RECh. 15 - Prob. 67RECh. 15 - Prob. 68RECh. 15 - Prob. 69RECh. 15 - Prob. 70RECh. 15 - Prob. 71RECh. 15 - Prob. 72RECh. 15 - Prob. 73RECh. 15 - Prob. 74RECh. 15 - Prob. 75RECh. 15 - Prob. 76RECh. 15 - Prob. 77RECh. 15 - Prob. 78RECh. 15 - Prob. 79RECh. 15 - Prob. 80RECh. 15 - Prob. 81RECh. 15 - Prob. 82RECh. 15 - Prob. 83RECh. 15 - Prob. 84RECh. 15 - Prob. 85RECh. 15 - Prob. 86RECh. 15 - Prob. 87RECh. 15 - Prob. 88RECh. 15 - Prob. 89RECh. 15 - Prob. 90RECh. 15 - Prob. 91RECh. 15 - Prob. 92RECh. 15 - Prob. 93RECh. 15 - Prob. 94RECh. 15 - Prob. 95RECh. 15 - Prob. 96RECh. 15 - Prob. 97RECh. 15 - Prob. 98RECh. 15 - Prob. 99RECh. 15 - Prob. 100RECh. 15 - Prob. 101RECh. 15 - Prob. 102RECh. 15 - Prob. 103RECh. 15 - Prob. 104RECh. 15 - Prob. 105RECh. 15 - Prob. 106RECh. 15 - Prob. 107RECh. 15 - Prob. 108RECh. 15 - Prob. 109RECh. 15 - Prob. 110RECh. 15 - Prob. 111RECh. 15 - Prob. 112RECh. 15 - Prob. 113RECh. 15 - Prob. 114RECh. 15 - Prob. 115RECh. 15 - Prob. 116RECh. 15 - Prob. 117RECh. 15 - Prob. 118RECh. 15 - Prob. 119RECh. 15 - Prob. 120RECh. 15 - Prob. 121RECh. 15 - Prob. 122RECh. 15 - Prob. 123RECh. 15 - Prob. 124RECh. 15 - Prob. 125RECh. 15 - Prob. 126RECh. 15 - Prob. 127RECh. 15 - Prob. 128RECh. 15 - Prob. 129RECh. 15 - Prob. 130RECh. 15 - Prob. 131RECh. 15 - Prob. 132RECh. 15 - Prob. 133RECh. 15 - Prob. 134RECh. 15 - Prob. 135RECh. 15 - Prob. 136RECh. 15 - Prob. 137RECh. 15 - Prob. 138RECh. 15 - Prob. 139RECh. 15 - Prob. 140RECh. 15 - Prob. 141RECh. 15 - Prob. 142RECh. 15 - Prob. 143RECh. 15 - Prob. 144RECh. 15 - Prob. 145RECh. 15 - Prob. 146RECh. 15 - Prob. 147RECh. 15 - Prob. 148RECh. 15 - Prob. 149RECh. 15 - Prob. 150RECh. 15 - Prob. 151RECh. 15 - Prob. 152RECh. 15 - Prob. 153RECh. 15 - Prob. 154RECh. 15 - Prob. 155RECh. 15 - Prob. 156RECh. 15 - Prob. 157RECh. 15 - Prob. 158RECh. 15 - Prob. 159RECh. 15 - Prob. 160RECh. 15 - Prob. 161RECh. 15 - Prob. 162RECh. 15 - Prob. 163RECh. 15 - Prob. 164RECh. 15 - Prob. 165RECh. 15 - Prob. 166RECh. 15 - Prob. 167RECh. 15 - Prob. 168RECh. 15 - Prob. 169RECh. 15 - Prob. 170RECh. 15 - Prob. 171RECh. 15 - Prob. 172RECh. 15 - Prob. 173RECh. 15 - Prob. 174RECh. 15 - Prob. 175RECh. 15 - Prob. 176RECh. 15 - Prob. 177RECh. 15 - Prob. 178RECh. 15 - Prob. 179RECh. 15 - Prob. 180RECh. 15 - Prob. 181RECh. 15 - Prob. 182RECh. 15 - Solve each inequality and graph the solution on a...Ch. 15 - Prob. 184RECh. 15 - Solve each inequality and graph the solution on a...Ch. 15 - Prob. 186RECh. 15 - Prob. 187RECh. 15 - Prob. 188RECh. 15 - Prob. 189RECh. 15 - Prob. 190RECh. 15 - Prob. 191RECh. 15 - Prob. 192RECh. 15 - Prob. 193RECh. 15 - Prob. 194RECh. 15 - Prob. 195RECh. 15 - Prob. 196RECh. 15 - Prob. 197RECh. 15 - Prob. 198RECh. 15 - Prob. 199RECh. 15 - Prob. 200RECh. 15 - Prob. 201RECh. 15 - Prob. 202RECh. 15 - Prob. 203RECh. 15 - Prob. 204RECh. 15 - Prob. 205RECh. 15 - Prob. 206RECh. 15 - Prob. 207RECh. 15 - Prob. 208RECh. 15 - Solve each equation containing an absolute...Ch. 15 - Prob. 210RECh. 15 - Prob. 211RECh. 15 - Prob. 212RECh. 15 - Prob. 213RECh. 15 - Prob. 214RECh. 15 - Prob. 215RECh. 15 - Prob. 216RECh. 15 - Prob. 217RECh. 15 - Prob. 218RECh. 15 - Prob. 219RECh. 15 - Prob. 1CACh. 15 - Prob. 2CACh. 15 - Prob. 3CACh. 15 - Prob. 4CACh. 15 - Prob. 5CACh. 15 - Prob. 6CACh. 15 - Prob. 7CACh. 15 - Prob. 8CACh. 15 - Prob. 9CACh. 15 - Prob. 10CACh. 15 - Prob. 11CACh. 15 - Prob. 12CACh. 15 - Prob. 13CACh. 15 - Prob. 14CACh. 15 - Prob. 1PTCh. 15 - Prob. 2PTCh. 15 - Prob. 3PTCh. 15 - Prob. 4PTCh. 15 - Prob. 5PTCh. 15 - Prob. 6PTCh. 15 - Prob. 7PTCh. 15 - Prob. 8PTCh. 15 - Prob. 9PTCh. 15 - Prob. 10PTCh. 15 - Prob. 11PTCh. 15 - Prob. 12PTCh. 15 - Prob. 13PTCh. 15 - Prob. 14PTCh. 15 - Prob. 15PTCh. 15 - Prob. 16PTCh. 15 - Prob. 17PTCh. 15 - Prob. 18PTCh. 15 - Prob. 19PTCh. 15 - Prob. 20PTCh. 15 - Prob. 21PTCh. 15 - Prob. 22PTCh. 15 - Prob. 23PTCh. 15 - Prob. 24PTCh. 15 - Prob. 25PTCh. 15 - Prob. 26PTCh. 15 - Prob. 27PTCh. 15 - Prob. 28PTCh. 15 - Prob. 29PTCh. 15 - Prob. 30PTCh. 15 - Prob. 31PTCh. 15 - Prob. 35PTCh. 15 - Prob. 36PTCh. 15 - Prob. 37PTCh. 15 - Prob. 38PTCh. 15 - Prob. 39PTCh. 15 - Prob. 40PTCh. 15 - Prob. 41PTCh. 15 - Prob. 42PTCh. 15 - Prob. 43PTCh. 15 - Prob. 1CPTCh. 15 - Prob. 2CPTCh. 15 - Prob. 3CPTCh. 15 - Prob. 4CPTCh. 15 - Prob. 5CPTCh. 15 - Prob. 6CPTCh. 15 - Prob. 7CPTCh. 15 - Prob. 8CPTCh. 15 - Prob. 9CPTCh. 15 - Prob. 10CPTCh. 15 - Prob. 11CPTCh. 15 - Prob. 12CPTCh. 15 - Prob. 13CPTCh. 15 - Prob. 14CPTCh. 15 - Prob. 15CPTCh. 15 - Prob. 16CPTCh. 15 - Prob. 17CPTCh. 15 - Prob. 18CPTCh. 15 - Prob. 19CPTCh. 15 - Prob. 20CPTCh. 15 - Prob. 21CPTCh. 15 - Prob. 22CPTCh. 15 - Prob. 23CPTCh. 15 - Prob. 24CPTCh. 15 - Prob. 25CPTCh. 15 - Prob. 26CPTCh. 15 - Prob. 27CPTCh. 15 - Prob. 28CPTCh. 15 - Prob. 29CPTCh. 15 - Prob. 30CPTCh. 15 - Prob. 31CPTCh. 15 - Prob. 32CPTCh. 15 - Prob. 33CPT
Knowledge Booster
Background pattern image
Math
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, subject and related others by exploring similar questions and additional content below.
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Discrete Mathematics and Its Applications ( 8th I...
Math
ISBN:9781259676512
Author:Kenneth H Rosen
Publisher:McGraw-Hill Education
Text book image
Mathematics for Elementary Teachers with Activiti...
Math
ISBN:9780134392790
Author:Beckmann, Sybilla
Publisher:PEARSON
Text book image
Calculus Volume 1
Math
ISBN:9781938168024
Author:Strang, Gilbert
Publisher:OpenStax College
Text book image
Thinking Mathematically (7th Edition)
Math
ISBN:9780134683713
Author:Robert F. Blitzer
Publisher:PEARSON
Text book image
Discrete Mathematics With Applications
Math
ISBN:9781337694193
Author:EPP, Susanna S.
Publisher:Cengage Learning,
Text book image
Pathways To Math Literacy (looseleaf)
Math
ISBN:9781259985607
Author:David Sobecki Professor, Brian A. Mercer
Publisher:McGraw-Hill Education
Interpreting Graphs of Quadratic Equations (GMAT/GRE/CAT/Bank PO/SSC CGL) | Don't Memorise; Author: Don't Memorise;https://www.youtube.com/watch?v=BHgewRcuoRM;License: Standard YouTube License, CC-BY
Solve a Trig Equation in Quadratic Form Using the Quadratic Formula (Cosine, 4 Solutions); Author: Mathispower4u;https://www.youtube.com/watch?v=N6jw_i74AVQ;License: Standard YouTube License, CC-BY