求值：(1-sin^6 x-cos^6 x)/(1-sin^4 x-cos^4 x)

求值：(1-sin^6 x-cos^6 x)/(1-sin^4 x-cos^4 x) 求值sin²x+cos²(π/6+x)+1/2sin(2x+π/6) sin(x+π/6)=1/2,则cos(π/3-x)求值 若tanα=√2,求值：(1-sin∧6x-cos∧6x)/(1-sin∧4x-cos∧4x) 求值sin(x-45)+cos(45+x) sin(π+π/6)-cos(π+π/4)cos(-π/2)+1求值 sin^a+cos^(π/6+a)+1/2sin(2a+π/6)求值 化简求值:sin(π/4-3x)*cos(π/3-3x)-cos(π/6+3x)*sin(π/4+3x) 求值： 2(sin^6 θ+cos^6 θ)-3(sin^4 θ+cos^4 θ) 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sin^2α+cos^2(π/6+α)+1)+1/2sin(2α+π/6) 求值sin^2a+cos^2a(π/6+a)+1/2sin(2a+6/π) 求值sin²α+cos²α(π/6+α)+1/2sin(2α+π/6） 已知6sin²α+sinαcosα-2cos²α=0,α∈（π/2,π）,求值1).(sinα-3cosα）/（sinα-cosα）；2）.sinαcosα-sin²α;3).sin²α-3cosαsinα-2 cos^6(π/8)-sin^6(π/8)=求值,[cos^2(π/8)-sin^2(π/8)][cos^4(π/8)+sin^4(π/8)+cos^2(π/8)sin^2(π/8)]=cos(π/4)[1-cos^2(π/8)sin^2(π/8)]=cos(π/4)[1-[sin^2(π/4)]/4]==7√2/16 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)] 求值:2sinπ/6+sin3π/2-2cosπ+2sinπ/3