Please send the answer 23 Prove that: cos 2α cos 2β + sin2 (α β) - Maths - Trigonometric Functions

Question

Please send the answer

23 Prove that: cos 2α cos 2β + sin2 (α
− β) − sin2 (α + β) =
cos2(α + β)

Pritam Singh · Accepted Answer

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Please send the answer 23. Prove that: cos 2α cos 2β + sin2 (α − β) − sin2 (α + β) = cos2(α + β)