what is the answer of it
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Step-by-step explanation:
3 ( sinФ+ cosФ) - ( sinФ+cosФ)³
=> ( sinФ+cosФ)( 3 - ( sinФ+cosФ)²)
=> ( sinФ+ cosФ)( 3 - 1 - 2sinФ*cosФ)
=> 2*( sinФ+cosФ)(1 - sinФ*cosФ)
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