You should know that .
So
.
Hello, bobbooey!
Take a look at where that equation comes from . . .
Code:| | * | * | | h * | | * | y | * | | * @ | - - * - - - - - + - - | x
We have angle in a right triangle.
The adjacent side is ; the opposite side is
Using Pythagorus, we find that: .
Therefore, we have:
. .