Find sin 2x, cos 2x, and tan 2x if tanx= and x terminates in quadrant II. 12
Trigonometry (11th Edition)
11th Edition
ISBN:9780134217437
Author:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Chapter1: Trigonometric Functions
Section: Chapter Questions
Problem 1RE:
1. Give the measures of the complement and the supplement of an angle measuring 35°.
Related questions
Topic Video
Question
![**Title: Solving Double-Angle Trigonometric Functions**
**Problem Statement:**
Find \( \sin 2x \), \( \cos 2x \), and \( \tan 2x \) if \( \tan x = -\frac{5}{12} \) and \( x \) terminates in quadrant II.
**Required Calculations:**
1. **For \( \sin 2x \):**
\[
\sin 2x = \Box
\]
2. **For \( \cos 2x \):**
\[
\cos 2x = \Box
\]
3. **For \( \tan 2x \):**
\[
\tan 2x = \Box
\]
**Instructions:**
Given that \( \tan x = -\frac{5}{12} \) in quadrant II, recall the trigonometric identities and relationships between the functions to solve for \( \sin 2x \), \( \cos 2x \), and \( \tan 2x \).
- Use the double-angle identity for sine:
\[
\sin 2x = 2 \sin x \cos x
\]
- Use the double-angle identity for cosine:
\[
\cos 2x = \cos^2 x - \sin^2 x
\]
or
\[
\cos 2x = 2 \cos^2 x - 1
\]
or
\[
\cos 2x = 1 - 2 \sin^2 x
\]
- Use the double-angle identity for tangent:
\[
\tan 2x = \frac{2 \tan x}{1 - \tan^2 x}
\]
First, determine \( \sin x \) and \( \cos x \) using the Pythagorean identity:
\[
\tan x = \frac{\sin x}{\cos x}
\]
Given that \( \tan x = -\frac{5}{12} \) and knowing that sine is positive and cosine is negative in quadrant II, you can find \( \sin x \) and \( \cos x \) before applying the double-angle formulas.
**Graphical Representation:**
On the right side of the problem, there's a](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F535bebc9-2960-46ab-b502-76f9901cf6f2%2Faef4d4a1-6608-4f96-a8ae-0323427b63af%2Fhr0c1m.jpeg&w=3840&q=75)
Transcribed Image Text:**Title: Solving Double-Angle Trigonometric Functions**
**Problem Statement:**
Find \( \sin 2x \), \( \cos 2x \), and \( \tan 2x \) if \( \tan x = -\frac{5}{12} \) and \( x \) terminates in quadrant II.
**Required Calculations:**
1. **For \( \sin 2x \):**
\[
\sin 2x = \Box
\]
2. **For \( \cos 2x \):**
\[
\cos 2x = \Box
\]
3. **For \( \tan 2x \):**
\[
\tan 2x = \Box
\]
**Instructions:**
Given that \( \tan x = -\frac{5}{12} \) in quadrant II, recall the trigonometric identities and relationships between the functions to solve for \( \sin 2x \), \( \cos 2x \), and \( \tan 2x \).
- Use the double-angle identity for sine:
\[
\sin 2x = 2 \sin x \cos x
\]
- Use the double-angle identity for cosine:
\[
\cos 2x = \cos^2 x - \sin^2 x
\]
or
\[
\cos 2x = 2 \cos^2 x - 1
\]
or
\[
\cos 2x = 1 - 2 \sin^2 x
\]
- Use the double-angle identity for tangent:
\[
\tan 2x = \frac{2 \tan x}{1 - \tan^2 x}
\]
First, determine \( \sin x \) and \( \cos x \) using the Pythagorean identity:
\[
\tan x = \frac{\sin x}{\cos x}
\]
Given that \( \tan x = -\frac{5}{12} \) and knowing that sine is positive and cosine is negative in quadrant II, you can find \( \sin x \) and \( \cos x \) before applying the double-angle formulas.
**Graphical Representation:**
On the right side of the problem, there's a
Expert Solution

This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 4 images

Knowledge Booster
Learn more about
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.Recommended textbooks for you

Trigonometry (11th Edition)
Trigonometry
ISBN:
9780134217437
Author:
Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:
PEARSON

Trigonometry (MindTap Course List)
Trigonometry
ISBN:
9781305652224
Author:
Charles P. McKeague, Mark D. Turner
Publisher:
Cengage Learning


Trigonometry (11th Edition)
Trigonometry
ISBN:
9780134217437
Author:
Margaret L. Lial, John Hornsby, David I. Schneider, Callie Daniels
Publisher:
PEARSON

Trigonometry (MindTap Course List)
Trigonometry
ISBN:
9781305652224
Author:
Charles P. McKeague, Mark D. Turner
Publisher:
Cengage Learning


Trigonometry (MindTap Course List)
Trigonometry
ISBN:
9781337278461
Author:
Ron Larson
Publisher:
Cengage Learning