Question

Sendo cos x = 2/7 ,qual eh o valor de m para sec x = m/4?

Answer 1

$sec x=\frac{1}{cos x} \\ \\ sec x = \frac{7}{2} \\ \\ \frac{m}{4}=\frac{7}{2} \\ \\ m=\frac{7.4}{2} \\ \\ m=14$

Answer 2

sec x = 1/cos x = 1/(2/7) = 7/2

7/2 = m/4
7*4 = 2m

2m = 28
m = 28/2
m = 14



Um abraço.