answer asap, thanks in advance
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Step-by-step explanation:
(1+cosx)²+(1-cosx)²+2sin²x
=1+2cosx+cos²x+1-2cosx+cos²x+2sin²x
=2+2cos²x+2sin²x
=2+2(cos²x+sin²x)
=2+2
=4
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