10. Which of the following is equivalent to sin(a + B) + sin(a – B)? b.sin(a? – B2) b. sin 2a c. 2 sin a sin ß d. 2 sin a cos ß cos 2x .

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.3: Trigonometric Functions Of Real Numbers
Problem 44E
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Answer the each of the following questions correctly and show your COMPLETE SOLUTIONS and COMPLETE EXPLANATIONS.

Answers(I already provided the answers I just need the COMPLETE SOLUTIONS and Complete Explanations "TRIGONOMETRIC IDENTITIES")

10. C

11. D

10. С
11. D
Transcribed Image Text:10. С 11. D
10. Which of the following is equivalent to sin(a + B) + sin( a – B)?
b. sin 2a
b.sin(a? – B2) c. 2 sin a sin ß
d. 2 sin a cos ß
11. Which of the following is NOT equal to cos 2X ?
cosx
C. COs x – sinx tanx
c. 2 cos x – sin x
d. sec x ·
2 sin x
d. sec x – 2sin? xtan x
cotx
Transcribed Image Text:10. Which of the following is equivalent to sin(a + B) + sin( a – B)? b. sin 2a b.sin(a? – B2) c. 2 sin a sin ß d. 2 sin a cos ß 11. Which of the following is NOT equal to cos 2X ? cosx C. COs x – sinx tanx c. 2 cos x – sin x d. sec x · 2 sin x d. sec x – 2sin? xtan x cotx
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