sin^3x-cos^3x化简等于多少
sin^3x-cos^3x化简等于多少
sin(sin(sin(sin(x)=cos(cos(cos(cos(x),X等于多少?
sin(-x) cos(-x)等于多少
SIN(30度-X)=1\3,则COS(120度+2X)等于多少.
f(x)=cos^3x+sin^2-cosx上的最大值等于多少?
(sin@-cos@除以sin@+cos@)+(sin@+cos@除以sin@—cos@)化简出来等于多少
sin^2(x)cos^2(x)积分等于多少
cos^2x-sin^2x等于多少?
如果f(cos x)=sin 3x,那么f(sin x)等于
sin x(sin x+cos x)=1求x等于多少
y=sin^2x-3sinxcosx+4cos^2x是否等于y=sin^2x+cos^2x+3cos^2x-3/2*si
已知sin X+cos X=m,|m|小于等于根号2且|m|不等于1,求sin X^3+cos X^3,sin X^4+