00:01
As you're allowed to use a calculator for this, just make sure you find where you can change your mode to be in degrees.
00:09
And so that's where mine is located.
00:12
You might, if you have a calculator, you might hit the mode button at the top and find where you can change it to degrees.
00:19
And then when you're asked to solve sign of x equals 0 .2, what you need to do is understand that x is equal to find how to find, the inverse button.
00:33
So this is where mine's located.
00:36
And it gives you the correct answer that it's 11 .537 degrees.
00:42
And that's it for x.
00:44
If you look at the next one where cosine of x equals two -thirds, i mean, i kind of jump to what you're supposed to do, is x will equal inverse cosine of two -thirds.
01:00
Now i need to copy this down because i've labeled it.
01:04
I should label this first letter a.
01:08
Anyway, you get about 48 .190 degrees.
01:14
So looking at letter c, very similarly.
01:18
This time it's tangent of x equals 5.
01:21
So to solve for x, find the inverse key, inverse tangent of 5.
01:30
So again, i need to copy this down.
01:33
So then this calculator will give me the correct answer.
01:35
About 78 .69 degrees.
01:39
You know, letter b.
01:41
Again, it's cotangent.
01:44
Now, here's the thing.
01:45
Well, unfortunately, i can't see on my side what you have in there.
01:51
But this calculator actually does the inverse co -tangent of whatever you have in there.
01:57
I'm going to put a question mark because i can't see it.
02:00
But with some calculators, you actually have to do one divided by or make it a fraction.
02:06
And you might need parentheses because not every calculator has the inverse tangent button and then type in what you have there.
02:12
Like i said, i can't see it on my end, what you have written there...