Question

(5) If sin alpha=½ and cos bita =½ then find value of alpha+ bita
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Answer 1

Answer:

90

Step-by-step explanation:

Here, sin(alpha)= 1/2

but we know

Sin30= 1/2

Therefore alpha= 30°

And

Cos(Beta)= 1/2

but cos60= 1/2

So(beta) = 60°

Value of alpha + value of beta =

30+60 = 90 (Ans)

Answer 2

Step-by-step explanation:

Sin α = 1/2

Cos β = 1/2

According to values of trigonometric table-

Sin 30° = 1/2

Cos 60° = 1/2

Therefore,

☆ Sin α = Sin 30°

=> α = 30°

☆ Cos β = Cos 60°

=> β = 60°

So, (α + β) = 30° + 60° = 90°