化简;3/2cosX-根号3/2sinx 根号3sin x/2+cos x/2
1个回答
化简;
根号3sin x/2+cos x/2
=2(根号3/2*sinx/2+1/2*cosx/2)
=2(sinx/2*cos30+cosx/2*sin30)
=2sin(x/2+30)
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