Question

if Sin A minus b is equals to 1 by 2 and Cost A + B is equals to 1 by 2 then find a b​

Answer 1

Step-by-step explanation:

Sin(A-B) = SinACosB - CosASinB

Cos(A+B) = CosACosB - SinASinB

Calculate by youself

Answer 2

Answer:

a=45°

b=15°

Step-by-step explanation:

sin(a-b) =1/2

sin(a-b) = sin30°

(a-b) = 30°

similarly

cos(a+b) = 1/2

(a+b) = 60°

a+b=60°

a-b=30°

2a = 90° (by adding both eqⁿ)

a=45°

so b = 60-a

b = 15°

Thank you

Hope it will help you.