Question

If tan A = 1 and tan B = √3 ; evaluate:
(i) cos A cos B - sin A sin B.
(11) sin A cos B + cos A sin B.​

Answer 1

refer to the ATTACHMENT...HOPE IT willHELP YOU..

HOPE ITS CORRECT...similarly you can find answer of 2nd ons

Answer 2

Answer:

1.cos (A+B)

2.sin(A+B)

if Tan A=1

A= π/4

Tan B = √3

B = π/3