Question

ayudaaaaaaa porfa es trigonométricas ​

Answer 1

fórmula de Pitágoras:

${h}^{2} = {x}^{2} + {y}^{2}$

hallando hipotenusa

${h}^{2} = {4}^{2} + {2}^{2} \\ {h}^{2} = 20 \\ {h} = \sqrt{20} \\ h = 2 \sqrt{5}$

$\sin( \alpha ) \times \cos( \alpha )$

$\frac{2}{2 \sqrt{5} } \times \frac{4}{2 \sqrt{5} } \\ \frac{2}{5}$