Question

Solve for a. Round your answer to the nearest tenth.
a = _(blank)_

Answer 1

In the figure, the value of a is 10.3

How to solve for side a

To solve for side a, we use trigonometry as follows

cos x = adjacent / hypotenuse

cos 31 = a / 12

a = 12 * cos 31

a = 10.286

a = 10.3