Prove that 1+cos 4 xsin 4 x 2 cos 2 x.
Question:
Prove that 1 + cos4x − sin4x ≡ 2 cos2x.
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To prove the equation 1 cos4x sin4x 2 cos2x well start with th...View the full answer
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Related Book For 
Edexcel AS And A Level Mathematics Pure Mathematics Year 1/AS
ISBN: 9781292183398
1st Edition
Authors: Greg Attwood
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