tan 0 cos²0 = 2 tan 0 cos² 0 - tan 0 1tan²0
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.4: Values Of The Trigonometric Functions
Problem 12E
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tan ? cos^2 ?= (2 tan ? cos^2 ? − tan ? )/(1 − tan2 ?)
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