Question

if sin (a-b)=1/2, cos(a+b)=1/2,O<a+b<90,a>b,then find a,b​

Answer 1

Sun(a-b)=1/2=30
Cos(a+b)=1/2=60
So a-b=30
a+b=60
- - -
———————
-2b=-30
b=30/2=15
a+15=60
a=60-15=45