How to calculate `sin 4x`?

What is the value of {(sin 4x+ sin4y} [(tan 2x- 2y)]}//(sin 4x -sin4y) ? {(sin 4x+ sin4y} [(tan 2x- 2y)]}//(sin 4x -sin4y) का मान क्या है?

If sin A=3/4 , calculate cos A and tan A.

If sin A = 3/4 calculate sec A.

If sin A = 3/4 , calculate sec A.

sin 4x sin 8x

sin 4x sin 8x

If sin A = 3/4 calculate cos A and tanA.

If sin A=(3)/(4) ,calculate cos A and tan A.

If sin A = ( 3 ) /(4) calculate cos A and tan A

If sin A=(3)/(4) ,calculate cosA and tan A