化简 √2/4sin x+√6/4cos x
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化简√2/4sinx+√6/4cosx化简√2/4sinx+√6/4cosx化简√2/4sinx+√6/4cosxsin(A+B)=sinAcosB+cosAsinBcos(A+B)=cosAcosB
化简 √2/4sin x+√6/4cos x
化简 √2/4sin x+√6/4cos x
化简 √2/4sin x+√6/4cos x
sin(A+B)=sinAcosB+cosAsinB
cos(A+B)=cosAcosB-sinAsinB
√2/4sin x+√6/4cos x
=√2/2(1/2sin x+√3/2cos x)
=√2/2sin(60+x)
√2/4sin x+√6/4cos x
=√2/2sin (x+pi/3)
化简(sin^2x-cos^4x+cos^2x-sin^4x)/(sin^2x-cos^6x+cos^2x-sin^6x)
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
化简sin^4x-sin^2x+cos^2x
化简:sin^4 x-sin^2 x+cos^2 x
化简sin^4x+cos^2x
化简(1)√3sin x+cos x (2)√2(sin x-cos x) (3)√2cos x-√6sin x
化简 √2/4sin(π/4-x)+√6/4cos(π/4-x)
化简 √2/4sin x+√6/4cos x
化简√2sin(∏/4-X)+√6cos(∏/4-x)
√2sin(x-π/4)+√6cos(x-π/4)化简
化简√2sin(π/4-x)+√6cos(π/4-x)
化简[1-(sin^4x-sin^2cos^2x+cos^4x)/(sin^2)]+3sin^2x
化简 1-sin^4x-cos^4x/1-sin^6x-cos^6x
化简(1-cos^4x-sin^4x)/(1-cos^6x-sin^6x)
y=4√2sin x cos x+cos 2x 的值域是
sin x + cos x = √2 * sin (x + Pi/4)及相关三角函数定理
2(sin^6x+cos^6)-3(sin^4x+cos^4x)
若tanα=√2,求值:(1-sin∧6x-cos∧6x)/(1-sin∧4x-cos∧4x)