(R)/(25)*(cos x-cos2x)/(1-cos x)

int(cos x-cos2x)/(1-cos x)*dx

Integrate the following: int{(5cos^3x+2sin^3 x)/(2sin^2 x*cos^2 x)+sqrt(1+sin2x)+(1+2sin x)/(cos^2x)+(1-cos2x)/(1+cos 2x)}dx

Integrate the following: int{(5cos^(3)x+2sin^(3)x)/(2sin^(2)x*cos^(2)x)+sqrt(1+sin2x)+(1+2sin x)/(cos^(2)x)+(1-cos2x)/(1+cos2x)}dx

int (1-cos2x)/(1+cos2x)dx =

cos2x-cos8x+cos6x=1

Solve the equation (1)/(2)+cos x+cos2x+cos3x+cos4x=0

To prove (cos5x+cos4x)/(1-2cos3x)=-cos2x-cos x

f (x) = det [[(cos x) / (2), 1,11, (cos x) / (2), - (cos x) / (2) - (cos x) / (2), 1 , -1]]

If : y=sinx[(1)/(cosx*cos2x)+(1)/(cos2x*cos3x)+(1)/(cos3x*cos4x)]," then: "(dy)/(dx)" at "x=(pi)/(4) is