SOLUTION: what is sin630? Technically, it's on the 270 degree line (between 3rd & 4th quadrant) Since it's on the y-intercept, wouldn't that made the triangle undefined? I'm not too

Question 791551: what is sin630?
Technically, it's on the 270 degree line (between 3rd & 4th quadrant)
Since it's on the y-intercept, wouldn't that made the triangle undefined?
I'm not too sure how this works, Please reply ASAP. Thank you.
Found 2 solutions by jim_thompson5910, KMST:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Since sin(270) = -1, this means that sin(630) = -1

The reason why sin(270) = -1 is because sin(theta) is equal to the y coordinate of the point on the unit circle. It turns out that the y coordinate at this angle is -1.
Answer by KMST(5347) (Show Source): You can put this solution on YOUR website!
Trigonometric functions cosine and sine are defined as the x and y coordinates of the point where the second side of the angle intersect the unit circle (a circle of radius 1, centered at the origin).
The angles are placed on the standard position of the first side coinciding with the positive x-axis, and angles are measured as the counterclockwise turn from the first side to the final side.
If you turn the positive x-axis counterclockwise turns, that is a .
After that turn, the final side of the angle overlaps the negative y-axis, and intersects the unit circle at the point (0,-1), with , , so and .
RELATED QUESTIONS
the midpoint of line ST is the orgin. Point t is located in quadrant too. what quadrant... (answered by Alan3354)
PIA is concerned about the decreasing number pf passengers. It’s trying to find the... (answered by Theo)
1. What can be said of points lying on the line through the origin, bisecting the 1st and (answered by Edwin McCravy)
I need help on what the steps are to solve this quadratic problem. Please show the... (answered by josgarithmetic)
Need help solving this quadratic equation. Please include steps on how to solve. Thank... (answered by solver91311)
Need help solving this quadratic equation. Please include steps on how to solve. Thank... (answered by solver91311)
1: Graph a sine function whose amplitude is 6, period is 4π , midline is... (answered by ikleyn)
Find the equation of the line through the point (6,6) and parallel to the point... (answered by Alan3354,ikleyn,math_tutor2020)
I have tried to make sense of this one and it bugs me and is even harder with no graphing (answered by stanbon)