Question

Prove that -
(cosx + cosy)*2 +(sinx + siny)*2
=4cos*2 (x+y/2)​

Answer 1

Answer:

Hey mate your answer is here

Plz see in the above picture

In this attachment two questions are solved of (+ or -)

Mark as brainlist

Answer 2

Answer:

here is tour answer by

Scarlet