C= [sin(2/x)+cos(1/x) ]^x 求C的极限x趋近于无穷大要求有详细的解题 过程哦，要把每个步骤写清楚

怎么证明2(1-sin x)(1+cos x)=(1-sin x+cos x)^2 求证（cos^2 x-sin^2 x)(cos^4 x+sin^4 x)+1/4 sin 2x sin 4x=cos 2x 已知(1+sin x)/cos x=-1/2,则cos/(sin x-1)=? 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 已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x 化简(sin x+cos x-1)(sin x-cos x+1)/sin 2x 求证：tan x/2=sin x/(1+cos x) 求证：1-sin(x)=cos(x)*tan(x/2) 已知(1+sin x)/cos x=1/2,则cos x/(sin x-1)的值是A:1/2B:-1/2C:2D:-2 函数y=(cos x+sin x)/(cos x-sin x)的最小正周期是多少?A.1 B π/2 C 2π D π 证明一个sin&cos的等式证明 1+sin^2(x)+sin^4(x)+sin^6(x)=[1-sin^8(x)]/[cos^2(x)] y=2cos x (sin x+cos x) 2cos x (sin x -cos x)+1 已知sin(x)+3cos(x)=2,求sin(x)-cos(x)/sin(x)+cos(x)=? sin(x/2)cos(x/2)= y=(sin x + COS x)^2 求证(3-sin^4 x-cos^4 x)/2cos^2 x=1+tan^2 x+sin^2 x (1+cos x-sin x)/(1-sin x-cos x)+(1-cos x-sin x)/(1-sin x+cos x)=?