Find the missing value to the nearest hundredth. cos ? = 2/5

Question

asked Oct 7, 2019 213k views

2 Answers

Viktor Joras · Answer 1 · 2019-10-09T16:02:00+0000

Answer:

$66.42^(\circ)$

Explanation:

Let x represent the missing value for our given equation.

We have been given an equation
$\text{cos}?=(2)/(5)$ . We are asked to find the missing value for our given equation.

$\text{cos}(x)=(2)/(5)$

Now, we will solve for x using arccos as:

$x=\text{cos}^(-1)((2)/(5))$

$x=66.421821521798^(\circ)$

Upon rounding our answer to nearest hundredth, we will get:

$x\approx 66.42^(\circ)$

Therefore, the missing value for our given expression would be
$66.42^(\circ)$ .