Mathematics

Problem

The triangle PQR is inscribed in the circle

x^2 + y^2 = 25

. If Q and R have coordinates (3, 4) and (-4, 3) respectively, then

\angle QPR

is equal to a.

\frac{\pi}{2}

\frac{\pi}{3}

\frac{\pi}{4}

\frac{\pi}{6}