Question

4) to calcularmes o cossene do tiangulo
abaiscoe Teremos​

Answer 1

${h}^{2} = {4}^{2} + {3}^{2} \\ h = \sqrt{16 + 9} \\ h = \sqrt{25} \\ h = 5$

$\cos( \alpha ) = \frac{cateto \: adjacente}{hipotenusa} \\ \cos( \alpha ) = \frac{4}{5} \\ \cos( \alpha ) = 0.8$