cos r+ sin? r =1 cos r – sin?r = cos 2r 1 sin?r =(1– cos 2r). 1 sin' z = (1 – cos 2r)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.3: The Addition And Subtraction Formulas
Problem 3E
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how to go from there to there?

Use an identity to reduce the power of the trigonometric
function to a trigonometric function raised to the first
power.
71. sin?x =
Transcribed Image Text:Use an identity to reduce the power of the trigonometric function to a trigonometric function raised to the first power. 71. sin?x =
cos r + sin? r =1
cos r – sin? r =cos 2r
sin? r = (1– cos 2.r)
sin? r = (1 – cos 2x)
(1 – cos 2r)
Transcribed Image Text:cos r + sin? r =1 cos r – sin? r =cos 2r sin? r = (1– cos 2.r) sin? r = (1 – cos 2x) (1 – cos 2r)
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