Prove that sin2 θ+cos4 θ=cos2 θ+sin4 θ
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Answer:
LHS = sin? 0 + cos* 0 =
=sin? 0 + (cos? 0) =sin 0 +1 – 2 sin? 0 + sin 0
=sin” 0 + (1 – sin? 0)²
= 1 sin? 0 + sin 0
=cos? 0 + sin 0
= RHS
Hence, LHS = RHS
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