contestada

Solve: 2sec(x) + 5 = 9
Which equation is equivalent to the given
equation?
cos(x) =1/2
cos(x) = -2
sin(x) = 1/2
sin(x) = -2

Respuesta :

Answer:

[tex]\cos(x)=\frac{1}{2}[/tex]

Step-by-step explanation:

[tex]2\sec(x)+5=9\\\\2\sec(x)=4\\\\\sec(x)=2\\\\\frac{1}{\sec(x)}=\frac{1}{2}\\ \\\cos(x)=\frac{1}{2}[/tex]

Thus, the first option is correct