00:01
You want to know what the length of the hypotenuse is in this right triangle.
00:04
So that would be the length of ab.
00:08
There are different ways you could do it.
00:10
One way is to find the measure of angle a using right triangle trick, because this would be a right angle here as well.
00:16
And so you could say, well, from angle a's perspective, we've got the adjacent in hypotenuse.
00:22
So we could say that the cosine, because remember it goes sine, cosine, tangent, adjacent hypotenuse is cosine.
00:31
The cosine of angle a is equal to adjacent of hypodontosis or 56.
00:36
So a would be equal to the inverse cosine of 5 .6.
00:40
If you're in degree mode, the inverse cosine of 56 is 33 .6 degrees.
01:00
This will allow us to find angle b by subtracting from 90 because this is a right triangle.
01:11
So that's 56 .4 degrees...