2cos(3x)+5cos(3x)-3
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2cos(3x)+5cos(3x)-3
化简sin(x)(cos(x)+cos(3x)+cos(5x)+cos(7x))
证明cos 2x cos x=1/2(cos x+cos 3x)
cos(π/3+x)+cos(π/3-x)
设f(sin x)=3-cos 2x,则f(cos x)=?
若F(sin x)=3-cos 2x 则F(cos x)=?
2sin^2x - 5sin x cos x=3 cos^2x,求X,
F(x)=[cos^3x-sin^2(x+pai)-cos(x+pai)+1]/[1+cos^2(7pai+x)+cos(-x),化简并求F(5pai/3)
定积分(兀/2到-兀/2)根号cos^3x-cos^5xdx
化简(1)√3sin x+cos x (2)√2(sin x-cos x) (3)√2cos x-√6sin x
cos(2x-π/3)+cos(2x+π/6)化简
若f(Sinx)=3-COS^2X求f(COS^X)表达式
cos(x-2派/3)=-cos(x+派/3)
求不定积分cos(3x)cos(2x)
(1)求函数f(x)=cos[(派x)/3]的值域(2)求值:cos(派/5)加cos(2派/5)加cos(3派/5)加cos(4派/5)有两道数学题,
三角函数解方程 (cos 3x)^3+ (cos 5x)^3 = 8 (cos 4x)^3 (cos x)^3
sin(x/3)cos(x/3)+√3cos^2(x/3) 化成Asin(Ωx+&)的形式
f(x)=(2sin^4 x)+(2cos^4 x)+(cos^2 2x) -3 化简