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Verify number 63 and 65 using the sum or difference identities

Verify number 63 and 65 using the sum or difference identities

Algebra & Trigonometry with Analytic Geometry
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter7: Analytic Trigonometry
Section7.1: Verifying Trigonometric Identities
Problem 47E
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Verify number 63 and 65 using the sum or difference identities
sin (x + y) 63. cos x cos y = tan x + tan y sin (x + y) 64. sin x sin y = cot x + cot y cos (x + y) 65. COs x COs y = 1 – tanx tan y %3D
Transcribed Image Text:sin (x + y) 63. cos x cos y = tan x + tan y sin (x + y) 64. sin x sin y = cot x + cot y cos (x + y) 65. COs x COs y = 1 – tanx tan y %3D
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