sin(360--x)cos(180+x)cos(90+x)
化简[sin(180+x)-tan(-x)+tan(-360-x)]/[tan(x+180)+cos(-x)+cos(-
sin(sin(sin(sin(x)=cos(cos(cos(cos(x),X等于多少?
化简:{cos(180*0+x)sin(x+360*0)}/sin(-x-180*0)cos(-180*0-x)
化简cos(180°+x)*sin(x+360°)/[sin(-x-180°)*cos(-180°-x)]
化简sin(x)(cos(x)+cos(3x)+cos(5x)+cos(7x))
sin(1/x)-cos(1/x)/x
(x*sin x*cos x)的导数
设f(x)=[2cos^3 x-sin^2 (360°-x)+2sin(90°+x)+1]/2+2cos^2 (180°
cos 2x /sin^2 x*cos^2 x不定积分
2cos x (sin x -cos x)+1
已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x
化简f(x)=2cos^3 x+sin^2 (360-x)-cos(180-x)-3 / 2+2cos^2(180+x)