Question

calcule o valor da expressão

Answer 1

$y = \frac{ 2 \sin(\pi) + \sin( \frac{\pi}{2} ) }{ \sin( \frac{\pi}{2} ) - 2sin( \frac{3\pi}{2} ) } \\ \\ y = \frac{2(0) + 1}{1 - 2( - 1) } \\ \\ y = \frac{1}{1 + 2} \\ \\ y = \frac{1}{3}$