The triangle $PQR$ is inscribed in the circle ${x^2} + {y^2} = 25$. If $Q$ and $R$ have co-ordinates $(3,4)$ and $(-4, 3)$ respectively, then $\angle QPR$ is equal to
The triangle $PQR$ is inscribed in the circle ${x^2} + {y^2} = 25$. If $Q$ and $R$ have co-ordinates $(3,4)$ and $(-4, 3)$ respectively, then $\angle QPR$ is equal to
- [IIT 2000]
- A
$\frac{\pi }{2}$
- B
$\frac{\pi }{3}$
- C
$\frac{\pi }{4}$
- D
$\frac{\pi }{6}$
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