3.) Given sin x and 13 0 < x <,find t he exact value of cos 2x and tan 2x.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.4: Multiple-angle Formulas
Problem 28E
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Can anyone help me with those two questions please please help me and thanks in advance
3.) Given sin x =
13
and 0<x <, find the exact value of cos 2x and tan 2x.
4.) Prove:
sin 2x
a)
2cos2 x
= tan x
b) sin 3x
3 sin x- 4sin³ x
[Hint: sin 3x = sin(2x + x)]
Transcribed Image Text:3.) Given sin x = 13 and 0<x <, find the exact value of cos 2x and tan 2x. 4.) Prove: sin 2x a) 2cos2 x = tan x b) sin 3x 3 sin x- 4sin³ x [Hint: sin 3x = sin(2x + x)]
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