Question

erificar se (sen 30°)² + (cos 30° )² =1

Answer 1

$(\sin 30^\circ)^2+(\cos 30^\circ)^2=1\\\\\left ( \dfrac{1}{2} \right )^2+\left ( \dfrac{\sqrt{3}}{2} \right )^2=1\\\\\\\dfrac{1}{4}+ \dfrac{3}{4}=1\\\\\dfrac{4}{4}=1$