Question

Calcule o valor da expressão abaixo:

Answer 1

$\Large\boxed{\begin{array}{l}\sf\dfrac{2\cdot cos(90^\circ)-3~sec(\pi)+cotg\bigg(\dfrac{3\pi}{4}\bigg)}{2\cdot sen(0^\circ)+cossec\bigg(\dfrac{3\pi}{2}\bigg)}\\\\\sf\dfrac{2\cdot0-3\cdot(-1)-1}{2\cdot0-1}\\\\\sf\dfrac{3-1}{-1}=\dfrac{2}{-1}=-2\end{array}}$