Question

Questão 02- Seja x um arco que pertence a 0 < x < π/2, sabendo que o cos x = 3/4, então sec x é? a) 1 b) 1/2 c) 4/3 d) 2/3

Answer 1

$\Large\boxed{\begin{array}{l}\sf cos(x)=\dfrac{3}{4}\\\sf sec(x)=\dfrac{1}{cos(x)}\\\\\sf sec(x)=\dfrac{1}{\frac{3}{4}}\\\\\sf sec(x)=\dfrac{4}{3}\blue{\checkmark}\\\huge\boxed{\boxed{\boxed{\boxed{\sf\maltese~alternativa~c}}}}\end{array}}$