Question

Prove that 2 cos^ 2 π/4 + 2 sec ^2 π/3 = 10 Pls answer fast

Answer 1

$2 {cos}^{2} \frac{\pi}{4} + 2 {sec}^{2} \frac{\pi}{3} \\ \\ = 2 \times ( \frac{1}{ \sqrt{2} } )^{2} + 2 \times ( {2})^{2} \\ \\ = 2 \times \frac{1}{2} + 2 \times 4 \\ \\ = 1 + 8 \\ \\ = 9$