Question

if cos alpha cosbeta -sin alpha sin beta​

Answer 1

Answer:

hey frnd how are you

see the picture for answer

I hope you get your answer

thnx for asking...

Answer 2

Answer:

Cos ( α + β )

Step-by-step explanation:

It is an identity

Cos ( α + β ) = Cos α Cos β - Sin α Sin β

( It comes in class 11

I studied half only akka )