" Evaluate "int(cos x)/(1+cos x)dx

Evaluate: ( i int(cos x)/(1-cos x)dx or int(cot x)/(csc x-cot x)dx (ii) int(cos^(2)x-sin^(2)x)/(sqrt(1+cos4x))dx

Evaluate int(1-cos2x)/(1+cos2x)dx.

Evaluate int (cos x)/(1 + sinx) dx

Evaluate: int(x+sin x)/(1+cos x)dx

Evaluate: int(x-sin x)/(1-cos x)dx

Evaluate int(cosx-cos2 x)/(1-cos x) dx

Evaluate : int (cos x)/(cos(x-a))dx .

Evaluate : int (cos x)/(cos(x+a))dx .

Evaluate: int(1-sin x)/(x+cos x)dx

Evaluate: int(1)/(cos3x-cos x)dx