$\lim_{x \rightarrow 0} \left( \sin^2 \left( \frac{\pi}{2 - ax} \right) \right)^{\sec^2 \left( \frac{\pi}{2 - bx} \right)}$

Mathematics

Problem

\lim_{x \rightarrow 0} \left( \sin^2 \left( \frac{\pi}{2 - ax} \right) \right)^{\sec^2 \left( \frac{\pi}{2 - bx} \right)}