Question

I need help on this problem

Answer 1

Answer:
`QR=4.04`

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`