00:01
If we knew that the cosine of t was negative 11 over 61, then we would be in the second quadrant.
00:13
And the angle with cosine is adjacent over hypotenuse.
00:25
It might look like this.
00:42
You can have this angle, well we'll call it t.
00:46
And then adjacent would be 11, technically negative 11 because we're in the position of the second quadrant.
00:54
And a radius or hypodonidus of 61, which would allow us using pythagorean theorem to find the other, the third side of this triangle.
01:03
It would be true that, i'll call this a for a moment, a squared plus 11 squared would be equal to the hypodonous squared.
01:14
So a squared would equal 61 squared minus 11 squared, and 61 squared minus 11 squared is the square of 3 ,600, and the square of 3 ,600 of 3 ,600.
01:26
To 60, which helps us piece together the other five trig ratios.
01:37
This would mean sign of t, since this would be in quadrant two, it's where the x coordinates are negative and the y coordinates are positive.
01:56
Tangent would also be negative.
01:58
We'll get there.
01:59
So sign would be opposite over hypotenuse from the angles...