9. Prove each identity. cos 0 COS sin 0 = 1 – tan 6 a) cos² 0 + sin 0 cos 0 %3D b) tan? x – sin? sin? x tan x %3D - 1 --1 – cos² x cos“ x c) tan? x – cos²x = 1 1 d) 1 + cos 0 %3D 1 cos 0 sin 0
9. Prove each identity. cos 0 COS sin 0 = 1 – tan 6 a) cos² 0 + sin 0 cos 0 %3D b) tan? x – sin? sin? x tan x %3D - 1 --1 – cos² x cos“ x c) tan? x – cos²x = 1 1 d) 1 + cos 0 %3D 1 cos 0 sin 0
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.2: Trigonometric Functions Of Angles
Problem 66E
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