In Problems 21100, establish each identity. (sin a cos 3) + (cos + sina) (cos sina) =
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In Problems 21–100, establish each identity.
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(sin a cos 3)² + (cosß + sina) (cosß sina) = -2 cos (sina cos/3)
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Precalculus Concepts Through Functions A Unit Circle Approach To Trigonometry
ISBN: 9780137945139
5th Edition
Authors: Michael Sullivan
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