Question

How do i solve this? can i have an explanation too if possible?

Answer 1

Answer:

x = 120

Step-by-step explanation:

First you want to get the equation into the form cosx = a

2 cos$\frac{x}{2}$=1

Divide both sides by two to get it into the form.

cos$\frac{x}{2}$= $\frac{1}{2}$

Now, on your calculator, use the inverse of cos, to solve for $\frac{x}{2}$.

$\frac{x}{2}$ = $cos^{-1}$( $\frac{1}{2}$)

$\frac{x}{2}$ = 60

Now you want to find x, so multiply both sides by 2.

x = 60 * 2 = 120

x can have many solutions; however, I have only given you one.