Question

if sin (a-b)=1/2 and cos (a+b)= 1/2 find A and B
where 0°<A+B < or equal to 90°

Answer 1

let
sin (a-b)=1/2
(a-b)=30
and
cos (a+b)=1/2
=60
So
A-B=30---1
A+B=60----2
by elimination method
A=45
B=15

Answer 2

hope it will help you !!