y=3-sin x-2con^2 x怎么化简

y=3-sin x-2con^2 x怎么化简 sin x乘con x和(sin x+con x)^2怎么化简 sin^2(x) -con^2(x) 化简 con^2（x）sin^2（x）等于多少 y=1-√4-x的平方+√tan x的定义域那个4-x平方是在一个根号里的 还有一题 sinα+cosα/2sinα-conα=2 tanα=? y=sin^2X+sin2X+3怎么求最值? y=sin(x+π/3)+2定义域怎么求? 1.y=x*e^(2x) 2.y=(sin(2x))/x 3.y=sin(3x+(π/3))怎么求导数! y=sin(x-pai/6)怎么变成y=2sin(X/2-pai/6) 求导数:Y=sin^2(3x)y=Sin^2(3X) 这道题怎么求导数.. y =(cos^2) x - sin (3^x),求y' 化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x) 请问怎么证明sinX+sin(X+Y)+sin(X+2Y)/cosX+cos(X+Y)+cos(X+2Y)=tan(X+Y), y=(sin x + COS x)^2 3sin^2x+-2sin^2y=2sinx sin^2x+-sin^2y=? y=sin^2×2x的导函数怎么求 sin平方2x matlab画几个二元函数x*y/(x^2+y^2)^0.51/(x+y)x*y/(x+y)1/(x*y)sin(x+y)sin(x*y)sin(x)+sin(y)这么多,回答了再加分怎么设置上下限? 若x属于[-3分之π,4分之π],求函数y=con平方x分之1+2tanx+1的最值及相应的x