Question

11. If sin Alpha =1/2
and cos beta = 1/2, then alpha + beta = ..........​

Answer 1

Answer:

90

Explanation:

sin alpha = 1/2 => alpha = 30

cos beta =1/2 => beta = 60

alpha +beta = 30 +60=90

Answer 2

Answer:

sin alpha = 1/2

sin alpha = sin 30°

alpha= 60°

____________________

cos beta = 1/2

cos beta = cos 60°

beta = 60°

____________________

A.T.Q

alpha + beta = 30°+60° = 90°