Assertion (A) : If `sin alpha+cos alpha=m` then `sin^6alpha+cos^6alpha=(4-3(m^2-1)^2)/4` Reason (R) : `0 <= sin 2alpha <= 1, AA alpha in i`

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Assertion (A): If sin alpha+cos alpha=m then sin^(6)alpha+cos^(6)alpha=(4-3(m^(2)-1)^(2))/(4) Reason (R) :0<=sin2 alpha<=1,AA alpha in i

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