求(1-sin^6x-cos^6x)/(1-sin^4x-cos^4x)的值

求(1-sin^6x-cos^6x)/(1-sin^4x-cos^4x)的值 求1-cos^6x-sin^6x/1-cos^4x-sin^4x的值, 化简 1-sin^4x-cos^4x/1-sin^6x-cos^6x 化简(1-cos^4x-sin^4x)/(1-cos^6x-sin^6x) 求值：(1-sin^6 x-cos^6 x)/(1-sin^4 x-cos^4 x) 已知sin[a-b]cos a-cos[b-a]sin a=3/5,b是第三象限角,求sin[b+5π/4]的值第一题1/2cos x-√3/2sin x第二题√3sin x+cos x第三题√2[sin x-cos x]第四题√2cos x-√6sin x y=sin^6(x)+cos^6(x)求值域 已知sin(x+π/3)=1/4,求sin(2π/3-x)+cos²(π/6-x) 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)] 化简（1)√3sin x+cos x (2）√2(sin x-cos x) （3）√2cos x-√6sin x 化简(sin^2x-cos^4x+cos^2x-sin^4x)/(sin^2x-cos^6x+cos^2x-sin^6x) 求证明.关于cos和sin 题目有点长0 0【cos(2x) + cos(4x) + cos(6x)】 / 【sin(2x) + sin(4x) + sin(6x) 】 = cot(4x) cos x/sin x+sin x/(1+cos x) 化简. sin(x+π/6)=1/2,求cos(π/3-x) sin(x/2+派/6)=1/2,求cos(x+派/3) 第一题1/2cos x-√3/2sin x 第二题√3sin x+cos x 第三题√2[sin x-cos x] 第四题√2cos x-√6sin x f'(sin x)=1-cos x 求f''(x) (1-cos^4X-sin^4x)∕(1-cos^6x-sin^6x)=化简(急)