化简sin^4α+cos^4α+1/2sin²2α=?

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化简sin^4α+cos^4α+1/2sin²2α=?化简sin^4α+cos^4α+1/2sin²2α=?化简sin^4α+cos^4α+1/2sin²2α=?sin^

化简sin^4α+cos^4α+1/2sin²2α=?
化简sin^4α+cos^4α+1/2sin²2α=?

化简sin^4α+cos^4α+1/2sin²2α=?
sin^4α+cos^4α+1/2sin²2α
=(sin^2α+cos^2α)²-2sin²αcos²α+1/2sin²2α
=1-1/2(2sinαcosα)²+1/2sin²2α
=1-1/2sin²2α+1/2sin²2α
=1