sin(40+x)cos(10+x)-cos(40+x)sin(10+x)

If sin(sin x+cos x)=cos(cos x-sin x) then the largest possible value of sin x, is

The value of cos(70^@+x)cos(10^@+x)+sin(70^@+x)sin(10^@+x) is equal to:

2tan2x = (cos x + sin x) / (cos x-sin x) - (cos x-sin x) / (cos x + sin x)

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

Prove that (cos 3 x)/(sin 2 xsin 4x)+(cos 5x)/(sin 4xsin 6x)+(cos 7x)/(sin 6xsin 8x)+(cos 9x)/(sin 8x sin 10x) =(1)/(2) (co sec x)[co sec2x-co sec 10x]

Prove that (cos 3 x)/(sin 2 xsin 4x)+(cos 5x)/(sin 4xsin 6x)+(cos 7x)/(sin 6xsin 8x)+(cos 9x)/(sin 8x sin 10x) =(1)/(2) (co sec x)[co sec2x-co sec 10x]

(cos x)/(1-sin x)=(1+cos x+sin x)/(1+cos x-sin x)

sin^(10)x+cos^(10)x=29/16cos^4 2x

sin^(10)x+cos^(10)x=29/16cos^4 2x

What is the value of {sin (x+y) -2 sin x+ sin(x-y)} /[cos (x-y) +cos (x+ y)-2 cos x] xx [(sin 10x- sin 8x)/ (cos-10x + cos 8x)] ? {[sin (x+y] -2 sin x+ sin(x-y)}//[cos (x-y) +cos (x+ y)-2 cos x]} xx [(sin 10x-sin 8x)//(cos10x + cos 8x)] का मान क्या है?