Answer:
Step-by-step explanation:
By the Pythagorean Theorem, we know
.
With this, we can find by plugging in what we know for :
.
Taking the square root, we get
.
Note: there seems to be a problem with the question? It doesn't specify what range lies in, so we don't know whether is positive or negative. In this case, I assumed it was positive.
From this, we can find :
so .
Using the difference formula, we know
.
Plugging in the values we know for and , we get