GA Q8

MCQ2 marks, −0.67

In a triangle $PQR, PS$ is the angle bisector of $\angle QPR \text{ and } \angle QPS =60^\circ$ . What is the length of $PS$ ?

(A)

$\left(\dfrac{(q+r)} {qr}\right)$

(B)

$\left(\dfrac {qr} {q+r}\right)$

(C)

$\large \sqrt {(q^2 + r^2)}$

(D)

$\left(\dfrac{(q+r)^2} {qr}\right)$

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