Question

Sin^2 30grade+sin^2 60grade

Answer 1

$\sin(30) = \frac{1}{2} \\ \sin(60) = \frac{ \sqrt{3} }{2} \\ ( \frac{1}{2} )^{2} + ( \frac{ \sqrt{3} }{2} )^{2} = \frac{1}{4} + \frac{3}{4} = \frac{4}{4} = 1$