化简：sin（π/3+4x）+cos（π/6-4x）

化简2sin^2[(π/4)+x]+根号3（sin^x-cos^x）-1 化简sin(x+7π/4)+cos(x-3π/4）步骤我已经找到撒sin(x+7π/4)+cos(x-3π/4)=sin(x+2π-π/4)+cos(x-π+π/4)我问下这一步是在干嘛?=sin(x-π/4)+cos[-(π-x-π/4)]=sin(x-π/4)+cos(π-x-π/4)=sin(x-π/4)-cos(x+π/4)=sin(x-π/4)-cos(x+π/2- 化简1+sin x/cos x·sin2x/2cos²（π/4-x/2） 化简sin(3π-x)cos(x-3/2)cos(4π-x)/tan(x-5π)cos(π/2+x)sin(x-5/2π) 化简sin(3π-x)cos(x-3/2)cos(4π-x)/tan(x-5π)cos(π/2+x)sin(x-5/2π) 化简：sin（π/3+4x）+cos（π/6-4x） 化简sin（2π+x）cos（π-x）sin（π-x）/cos（x-π）sin（-π-x）sin（π+x） sin cos之间怎么转换?sin(π/3-2X）等于cos多少? 化简：[sin（2π－2）cos（π＋x）tan（π－x）]/[cos（π－x）sin（3π－x）sin...化简：[sin（2π－2）cos（π＋x）tan（π－x）]/[cos（π－x）sin（3π－x）sin（－π－x）] 化简sin(x-π/4)+cos(x+π/4) cos(x+π/4)+sin(x+π/4)化简 tanx=m,则{sin(x+3π）+cos(π+x)}/{sin(-x)-cos(π+x）}=? 三角函数的计算题sin（X-2π）+sin(-x-3π）cos（X-3π）/cos（π-x）-cos（-π-x）cos（x-4π）等于多少? [（sin x-cos x）/(sin x+cos x)]^4 求定积分 积分区间0-π/4 f(x)=cos(2x-x/3)+2sin(x-π/4)sin(x+π/4)sin(x+π/4)化简. sin(x+π/3)+（tanπ/6）cos(x+π/3) 化简 sin(x+π/3)+（tanπ/6）cos(x+π/3) 化简 （1）化简:根号2sin(π/4-x)+根号6cos(π/4-x)（2）sin(67°-x)cos(x-22°)+cos(67°-x)cos(112°-x)的值为 化简[1-(sin^4x-sin^2cos^2x+cos^4x)/(sin^2)]+3sin^2x