Question

Find the value of y. Round your answer to the nearest tenth

Answer 1

9.6

Step-by-step explanation

The given trigonometric equation is:

`\cos(21 \degree) = (9)/(y)`

We want to find y, so we multiply both sides by y to get,

`y\cos(21 \degree) = (9)/(y) * y`

Cancel out the common factors,

.

`y\cos(21 \degree) = 9`

. Divide both sides by cos(21°)

`y= (9)/(\cos(21 \degree))`

`y = 9.64`

To the nearest tenth, y=9.6