Question

if a + b + c = then prove that sin 2a + sin 2b + sin 2c = 4cos a cos b cos c.

Answer 1

Hello My Friend !! The Question You Have Typed Is Incorrect .. So Put The Proper Question And Then Post It Again.

THEIR SHOULD BE A VALUE FOR A + B + C

Thank You

Answer 2

Answer:

No, It's correct question only