" 1."x^(4)-2sin x+3cos x

If sin x ( cos ""(x)/( 4) - 2 sin x) + ( 1 + sin "" (x)/( 4) - 2 cos x) cos x = 0 then x =

Prove that: (i) sin 3x+"sin" 2x-"sin" x = 4 sin x cos((x)/(2))cos((3x)/(2)) (ii) ("sin" 3x+"sin" x)"sin" x+(cos 3x-cos x)cos x=0.

Prove that: sin" "3x" "+" "sin" "2x" "+" "sin" "x" "=" " 4" "sin" "x" "cos x/2 cos (3x)/2

Evaluate: int(3+2cos x+4sin x)/(2sin x+cos x+3)dx

int(2 sin x+3 cos x+4)/(3 sin x+4 cos x+5)dx.

3. (sin x+cos x)(1-sin x cos x)=sin^(3)x+cos^(3)x

int(1)/(4sin^(2)x+3sin x cos x+2 cos^(2)x)dx=

tan^(-1)[(2cos x-3sin x)/(3cos x+2sin x)]

If int(3cos x-2sin x)/(4sin x+5cos x)dx=Ax+B log|5cos x+4sin x| then (A,B)=