Question

If sin (A - B) =1/2 .cos(A +B)=1/2. 0°<A+B≤90°then:

a A = 45°, B = 15°
6A = 45°, B = 30°
C A = 15°, B = 45°
(d) A = 30°, B = 45°
​

Answer 1

answer is option A

A-B=30

A+B=60

A=45.

B=15