Question

cos (A-B) =? please answer​

Answer 1

Answer:

Cos(A- B) = cos A cos B + sin A sin B

Hope it helps you.

Thanks

Answer 2

Answer:

cos(A-B)= cosAcosB - simAsinB ( REMEMBER)

Step-by-step explanation:

=》cos (A-B)

=》cos{A+(-B)}

=》cosAcos(-B) - sinAsin(-B)

=》cosAcosB - sinA(-sinB)