I need help on this problem

Question

asked Oct 18, 2020 117k views

1 Answer

Chris Laskey · Answer 1 · 2020-10-22T04:33:33+0000

Answer:

Explanation:

For this exercise you must use the followinG Trigonometric Identity:

$tan\alpha=(opposite)/(adjacent)$

In this case, given the right triangle PQR, you can identify that:

$\alpha=60\°\\opposite=PR=7.0\\adjacent=QR$

Then, the next step is to substitute those values into
$tan\alpha=(opposite)/(adjacent)$ :

$tan(60\°)=(7.0)/(QR)$

And the final step is to solve for "QR" in order to find its value.

So you get that this is:

$(QR)(tan(60\°))=7.0\\\\QR=(7.0)/(tan(60\°))\\\\QR=4.04$