Question

2 SinA.SinB = cos (A-B) - cos (A+B)

We have proved this !

LHS = RHS HE KAY.​

Answer 1

Answer:

what do you expect

I can't understand what do you have asked

Answer 2

Answer:

Your one question is who is the first president of india the answer D.R Rajendar prasad is your answer he was the 1st president