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

Question

asked Sep 23, 2020 114k views

1 Answer

Kedar Kamthe · Answer 1 · 2020-09-29T15:09:21+0000

ANSWER

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