Concept Check For each expression in Column I , choose the expression from Column II that completes an identity. One or both expressions may need to be rewritten. II A. s i n 2 x c o s 2 x B. 1 s e c 2 x C. sin( –x ) D. csc 2 x – cot 2 x + sin 2 x E. tan x cos 2 x = ________
Concept Check For each expression in Column I , choose the expression from Column II that completes an identity. One or both expressions may need to be rewritten. II A. s i n 2 x c o s 2 x B. 1 s e c 2 x C. sin( –x ) D. csc 2 x – cot 2 x + sin 2 x E. tan x cos 2 x = ________
Solution Summary: The author explains the trigonometry identity mathrmcos2x in column II with the given expression.
Concept Check For each expression in Column I, choose the expression from Column II that completes an identity. One or both expressions may need to be rewritten.
7. From a point 20 m away on a level ground, the angle of elevation to the bottom of a
the top of the window is 32°. Calculate the
window is 27° and the angle of elevatim
height of the window.
(3 marks)
32
SOUCAHTOA
Rom
Coso-Adj
opponite
1270
H
X
Hyp
Tant=OPP
Adj
20 #
Zom
Adjacent
CoS2E 20 XHX Tanz 20
20
K
-0.0445503261 -1.764201788
0-044550326 60044550320
(1 mark) 3960
8. All odd numbers from 1 to 10 are arranged in descending order to form a number.
(i) Write the number.
35798.
97531
31
(ii) Write the total value of the second digit of the number formed in (a) (i)
FA 7X1000-7000
이
(1 mark)
9. A cylinder has a diameter of 28 cm and the height is 18 cm. Calculate its volume.
2
22 × 14 × 14 × 18
-110880m
3
(3 marks)
10. The figure below shows a right pyramid with AB = 3 cm, BC = 5 cm, and AV
VC = VD = 4 cm. Draw its net.
V
3+
12
7/18
(2/20
2105
SSS
20
Find the exact values of sin(2u), cos(2u), and tan(2u) given
2
COS u
where д < u < π.
2
Chapter 5 Solutions
MyLab Math with Pearson eText -- 24-Month Standalone Access Card -- for Trigonometry
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, trigonometry and related others by exploring similar questions and additional content below.
Fundamental Trigonometric Identities: Reciprocal, Quotient, and Pythagorean Identities; Author: Mathispower4u;https://www.youtube.com/watch?v=OmJ5fxyXrfg;License: Standard YouTube License, CC-BY