Question

Sendo x = π/2, calcule o valor da expressão abaixo. 

a) - 1/2
b) -1
c) 1
d) 0
e) 1/2​

Answer 1

Resposta:

Alternativa C

Explicação passo-a-passo:

$\frac{\pi}{2} = 90 \: graus$

$\frac{ \sin(90) + \cos(90) }{ \sin(90) } = \frac{1 + 0}{1} = \frac{1}{1} = 1$

Answer 2

$\boxed{\begin{array}{l}\rm\dfrac{sen(x)+cos(x)}{sen(x)}\bigg|_{x=\dfrac{\pi}{2}}=\dfrac{sen\bigg(\dfrac{\pi}{2}\bigg)+cos\bigg(\dfrac{\pi}{2}\bigg)}{sen\bigg(\dfrac{\pi}{2}\bigg)}\\\\\rm\dfrac{sen(x)+cos(x)}{sen(x)}\bigg |_{x=\dfrac{\pi}{2}}=\dfrac{1+0}{1}=\dfrac{1}{1}=1\\\huge\boxed{\boxed{\boxed{\boxed{\rm\dagger~\red{\maltese}~\blue{alternativa~c}}}}}\end{array}}$