Question

In a   ΔABC, I is the incentre. The ratio IA : IB : IC is equal to

(a)  cosec A/2 : cosec B/2 : cosec C/2

(b)  sin A/2 : sin B/2 : sin C/2

(c)  sec A/2 : sin B/2 : sin C/2

(d)  None of these

Answer 1

Correct option (a) 

Explanation:

Here BD : DC = c : b, but BD +DC = a