Math, asked by nikitapal4339, 11 months ago

Is cos x - cos y = - 2 sin ( x+y)/2.sin (x-y)/2

Answers

Answered by harshitapandey547

0

Answer:

yes

Step-by-step explanation:

it is an formula

cosA-cosB = 2sin(A+B)/2sin(B-A)/2

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