Question

Given that sinA= 1 2 and cosB= 1 2 then the value of A+B is :

Answer 1

Given:

sinA = 1/2

cosB = 1/2

Values used:

sin30° = 1/2

cos60° = 1/2

Calculation:

sinA = 1/2 = sin30° 

⇒ A = 30°

 cosB = 1/2 = cos60° 

⇒ B = 60° 

We have to find the value of A + B

A + B = 30° + 60° ⇒ A + B = 90° 

∴ The value of A + B is 90°