Prove the identity. cos 3 = 4 cos 3 3 cos
Question:
Prove the identity.
cos 3θ = 4 cos3θ – 3 cos θ
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Step by Step Answer:
Consider left hand side expression cos3 cos 2 Use addition ...View the full answer
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Related Book For 
Calculus Early Transcendentals
ISBN: 9781337613927
9th Edition
Authors: James Stewart, Daniel K. Clegg, Saleem Watson, Lothar Redlin
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