2 cos 20 9) sin 20 = cot 0 – tan 0 %3D

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section: Chapter Questions
Problem 41RE
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how do i prove this?
9)
2 cos 20
%3D
sin 20
= cot 0 - tan 0
Transcribed Image Text:9) 2 cos 20 %3D sin 20 = cot 0 - tan 0
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