Question

*Given that sin α = 1/2 and cos β = 1/2, then the value of (α + β) is ……………*

1️⃣ 0°
2️⃣ 30°
3️⃣ 60°
4️⃣ 90​

Answer 1

Answer:

4) 90°

Step-by-step explanation:

sin a = 1/2

sin a = sin 30°

a = 30°

cos b = 1/2

cos b = cos 60°

b = 60°

Therefore,

(a+b) = (30°+60°) = 90°

Answer 2

Step-by-step explanation:

sin alpha = 1/2

sin alpha = sin 30°

alpha= 30°

cos beeta =1/2

cos beeta = cos 60°

beeta=60°

(alpha+beeta)=(30°+60°)

=90°