Question

Sin(A-B)=1÷2 and cos(A+B)=1÷2

Answer 1

Answer:

according to question

A-B = 30. ..(1) and A+B = 60. ....(2)

add (1) and (2)

we get 2A = 90

thus A= 45 °

and put this in any of the eqn

we get B = 15°

hope this will help you