化简sin^4α+cos^4α+1/2sin²2α=?

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/18 09:43:02
化简sin^4α+cos^4α+1/2sin²2α=?
x){3̼8sPHMF[{"}ِf2U`5 UFPU@Z"Pzn#P n.PX$V 7jdal @>ye

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