Expression
=sinθ+sinØ/cosθ+cosØ + cosθ-cosØ/sinθ-sinØ
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Explanation:
From the above equation, we get
cosθ=sinθ
Hence
θ=45 0Thereforesin 4θ+cos 4 θ
=sin 4 45 0
+cos 4/ 450
=2×( 21 ) 4=2× 1/4
= 2/1
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