**If sin alpha = 1/2 and cos beta = 1/2, then the value of (alpha + beta) is**

(a) 0

(b) 30

(c) 60

(d) 90

**Answer :**

Sin alpha = 1/2

Sin alpha = sin 30°

Alpha = 30°

Cos alpha = 1/2

Cos beta = cos 60°

Beta = 60°

Now, alpha + beta

= 30°+60°

= 90°

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