sin (20) 1+cos(20) =tan (0)

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.2: Trigonometric Equations
Problem 28E
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I’m having trouble proving these two identities
sin(20)
1+cos(20)
tan (0)
1+cos(21)
2 cos(1)
sin(2t) cos(t) 2sin(t)-1
-
Transcribed Image Text:sin(20) 1+cos(20) tan (0) 1+cos(21) 2 cos(1) sin(2t) cos(t) 2sin(t)-1 -
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