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CosA + cos2^A=1 then sin2^A +sin4^=1 proof |
Answer» \xa0Since cos A + cos2\xa0A=1\xa0Now,cosA= 1-cos2A=sin2AThen taking L.H.S. sin2A+sin4A=Sin2A(1+sin2A)=CosA(1+cosA)CosA+cos2A=1(given)L.H.S =1 Hence proved |
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