00:02
Okay, so we have that tangent of a equals, so tangent of a equals, what is it, 1 .7321.
00:11
1 .7321.
00:14
So this is the ratio, right? and what we're trying to find is what is a? what is that angle, a? well, we can do that by taking the inverse tangents.
00:24
We're going to say that the tangent negative of inverse.
00:27
So this means the inverse tangent of this number, 1 .7.
00:32
Three, two, one, it's going to give us the measure of angle a.
00:37
All right.
00:37
So we don't know what that is.
00:39
All we're going to do is use a calculator.
00:41
So i'm going to go to desmos .com, or they have our calculator right here, scientific calculator.
00:46
And i'm going to hit this function button and hit tangent negative one of what was the number 1 .7321.
00:51
1 .7321.
00:53
Except it's got to be inside the parentheses.
00:55
There we go.
00:56
And look at that.
00:57
It gives us a 60 degree.
00:58
And it says to round to the nearest degree.
01:00
So that is a 60 degree angle, boom.
01:02
And now, look, what we're going to do is just for all of these, all of these, we're going to put it into the calculator.
01:08
It's going to be so easy.
01:09
Watch.
01:10
Right.
01:11
So we're going to say inverse sign.
01:13
I'm looking at sign of b now.
01:14
I'm looking at here.
01:16
Inverse sign of 0 .574.
01:19
So i'm going to say inverse sign of 0 .574.
01:23
And look at that.
01:24
35 degrees...