化简sin(x+120°)+sin(x+240°)
化简sin(x+120°)+sin(x+240°)
化简sin(x+60°)+2sin(x-60°)-3
sin(sin(sin(sin(x)=cos(cos(cos(cos(x),X等于多少?
化简sin(2π+x)cos(π-x)sin(π-x)/cos(x-π)sin(-π-x)sin(π+x)
化简cos²(-X)-【tan(360°+X)】/【sin(-X)】
化简2sin^2[(π/4)+x]+根号3(sin^x-cos^x)-1
化简【完整步骤!】1.(sin^4x-sin^2x)/secx2.sin^4x-cos^4x【这道题的正确答案是sin^
1/sin^2x的不定积分谢谢!(是1/sin x * sin x)
化简cos(X-30°)+sin(X+30°)+cosX+1
化简:(1)sin(540°−x)tan(900°−x)
化简(1)√3sin x+cos x (2)√2(sin x-cos x) (3)√2cos x-√6sin x
sin(-x) cos(-x)等于多少