00:01
So the first thing to mention in this problem, sign of 2 theta, is equal to negative .7843, is the fact that they want your answer in degrees.
00:19
So theta is smaller than 360 degrees.
00:23
So to solve this problem, the very first thing i would do is, so 2 theta would be equal to inverse sign.
00:32
Of that value, negative 0 .7843.
00:37
But when i type that into my calculator, again, make sure you're in .7843.
00:44
Make sure you are in the correct mode, that you're in degree mode.
00:49
You get an answer of negative 51 .656 degrees.
00:56
That's me rounding, by the way.
00:58
So what that tells me, first of all, is that we went clockwise because it's a negative angle, 51 .656 degrees.
01:10
So what i need to realize is that where sign is a negative value is in the third quadrant, and it's the same angle.
01:20
So what i would do is take pi plus 51 .65.
01:28
So i'm just typing into my calculator.
01:33
Oh rats it's 180 degrees isn't it so it's 180 plus that 51 .656 and i get an answer of 231 .656 degrees i should have taken 360 and just done a full revolution i guess i should do it this way adding 360 that way to that 5, 51 .656.
02:04
That's wrong value.
02:06
There we go, which is 308 .344...