Establish the identity: (sin cos ) 2 + (sin sin ) 2 + cos 2

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Establish the identity:

 (sin θ cos ϕ)2 + (sin θ sin ϕ)2 + cos2 θ = 1

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Related Book For  answer-question

Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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