Question

Qual o valor de x, na equação x = − sen30 ° + cos60° + tag45° − cos180° *​

Answer 1

$\displaystyle \text x = -\text{sen}(30^\circ)+\text{cos}(60^\circ)+\text{tg}(45^\circ)- \text{cos}(180^\circ) \\\\ -\text{sen}(30^\circ) = \frac{-1}{2} \\\\ \text{cos}(60^\circ)=\frac{1}{2} \\\\ \text{tg}(45^\circ) = 1 \\\\ \text{cos}(180^\circ) = -1 \\\\ \underline{\text{substituindo os respectivos valores}}: \\\\ \text x = -\frac{1}{2}+\frac{1}{2} + 1 - (-1) \\\\ \text x = 1+1 \\\\ \huge\boxed{\text x = 2\ }\checkmark$