00:01
Okay, so we know that xy is equal to cosine of theta, which is equal to negative 15th, 8, 17th.
00:08
Okay, so let's first to tangent of theta.
00:13
So tangent of theta, that's equal to sine of theta over cosine of theta, all right? tangent is sine over cosine, which is equal to, while sine of theta is 817th, right? your point xy, the y value is your, sine of theta.
00:32
So sign of theta is going to be 817s divided by cosine of theta, which is negative 1517s.
00:40
Okay, so we invert and multiply here and see the tangent of theta is equal to negative 815s.
00:51
Okay, all right, how about so there's tangent of theta.
01:02
Well, if you wanted to do cotangent of theta or cotangent of theta or co -tangent of theta, or co -tangent of theta.
01:08
Is just one over tangent.
01:09
So that's going to be just the reciprocal here.
01:12
So it's going to be negative 15 eighths.
01:23
Okay, so there's cotanjanjan of theta.
01:28
What else do we need? well, sine and cosine.
01:33
So sine of theta is just your first point here.
01:37
So sign of theta is negative 1517s.
01:42
So sine of theta is negative 15...