sin(1/x)*cos(1/x)怎么解- -.忘了

sin(1/x)*cos(1/x)怎么解- -.忘了 怎么证明2(1-sin x)(1+cos x)=(1-sin x+cos x)^2 cos(sin x)怎么解 cos x/sin x+sin x/(1+cos x) 化简. lim(sin(x^2*cos(1/x)))/x怎么做? 1/(1+cos(x)*sin(x))怎么积分 Sin^x怎么变化成 1-cos(2x) /2 化简(sin x+cos x-1)(sin x-cos x+1)/sin 2x 【【【高数】】】这道极限怎么解?lim(sin(2/x)+cos(1/x))^x 证明tan^2x-sin^2x=tan^2x*sin^2x解sin^2x sin^2x--------- - -----------cos^2x 1等于sin^2x sin^2x--------- - -----------cos^2c cos^2x+sin^2x接下来还能做吗?这道题还有其他证法吗?怎么能等式两边同除呢？这是证明题，证 sinx-1)/cosx怎么化成[sin(x/2)-cos(x/2)]/[cos(x/2)+sin(x/2 1+cos平方x-sin平方x怎么转化成2cos平方x 2cos(x/2)(3^(1/2)sin(x/2)-cos(x/2))怎么化简? 2cos x (sin x -cos x)+1 1/(sin x+cos x) 的不定积分 (1+cos x-sin x)/(1-sin x-cos x)+(1-cos x-sin x)/(1-sin x+cos x)=? cos x/( 1-sin x)化简 sinX+cosX=1/5 sin方x+COS方X=1怎么解RT