11. Prove each identity. cos 2x + 1 a) sin 2x = cot x h) CSc 2x + cot 2x = cot x sin 2x 2 tan x b) 1 = cot x i) 1 + tan´ x = sin 2x Cos 2x c) (sin x + cos x)? = 1 + sin 2x sin 0 COS CSc t d) cos 0 = cos 20 j) sec 2t = CSc t - 2 sin t
11. Prove each identity. cos 2x + 1 a) sin 2x = cot x h) CSc 2x + cot 2x = cot x sin 2x 2 tan x b) 1 = cot x i) 1 + tan´ x = sin 2x Cos 2x c) (sin x + cos x)? = 1 + sin 2x sin 0 COS CSc t d) cos 0 = cos 20 j) sec 2t = CSc t - 2 sin t
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.3: Trigonometric Functions Of Real Numbers
Problem 43E
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