4. cos 3θ + cos θ = 4 cos^3 θ – 2 cos θ 5. cosx/sec2x −sinx/csc2x = cos3? 6.1+cotx/cotx−1 = 1+sin2x/cos2x
4. cos 3θ + cos θ = 4 cos^3 θ – 2 cos θ 5. cosx/sec2x −sinx/csc2x = cos3? 6.1+cotx/cotx−1 = 1+sin2x/cos2x
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 60E
Related questions
Question
Answer 4-10 using:
OTHER TRIGONOMETRIC IDENTITIES
A.
B. Functions of Twice an Angle
C. Functions of Half an Angle
D. Sum and Difference of Functions
E. Product-to-Sum Identities
4. cos 3θ + cos θ = 4 cos^3 θ – 2 cos θ
5. cosx/sec2x −sinx/csc2x = cos3?
6.1+cotx/cotx−1 = 1+sin2x/cos2x
7. 2cot4x = cot2x – tan2x
8. tan 6a sec 3a = 2sin 3a sec 6a
9. sec2 2x – 1 = 1−cos4x/1 + cos4x
10. csc (A − B) = cscA cscB/cotB − cotA
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