(3) (a) Express cos(3r) in terms of sinx and cosr. (b) Prove that -cosz 1+cosI tan %3D (c) Sketch the graph of y = 1+ sin(r+)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 40E
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(3) (a) Express cos(3x) in terms of sinx and cosr.
(b) Prove that
1-cosz
1+cosz
tan?
(c) Sketch the graph of y = 1+ sin(x + )
Transcribed Image Text:(3) (a) Express cos(3x) in terms of sinx and cosr. (b) Prove that 1-cosz 1+cosz tan? (c) Sketch the graph of y = 1+ sin(x + )
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