Ask your own question, for FREE!
Mathematics
OpenStudy (anonymous):

does anyone know unit circle?

OpenStudy (shadowfiend):

I do. What do you need to know about it?

OpenStudy (anonymous):

what is the difference between a termanial point and a reference number?

OpenStudy (shadowfiend):

I believe a reference number is the smallest angle needed to get between any given point on the unit circle and the X axis. A terminal point, on the other hand, is an actual (x, y) coordinate point that exists on the unit circle. For example, take pi / 2, or 90 degrees. It has a reference angle of pi / 2, because the smallest angle between it and the x axis is 90 degrees (since it is exactly in the middle of the unit circle with respect to the x axis). The terminal point at pi / 2 is (0, 1) -- 0 on the x axis, 1 on the y axis.

OpenStudy (anonymous):

ohh okayy another thingg, the question asks to solve sin 1 on the figure and then a calculator, how do you calculate the value of it on the figure(meaning the unit circle?)

OpenStudy (shadowfiend):

As another example, take 3pi / 4, or 45 degrees. It has a reference number of pi / 4, because the shortest angle to get from 3pi / 4 to the X axis is the pi / 4 needed to get to pi / 2, which is directly on the X axis. Meantime, its terminal point is $$\left(\frac{\sqrt{2}}{2}, \frac{\sqrt{2}}{2}\right)$$.

OpenStudy (shadowfiend):

sin(1)?

OpenStudy (anonymous):

1 radian is a little less than 60 degrees or pi/3 radians. sin(pi/3) is .866, so sin(1) is close to that, but a little less.

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
Astrid1: Time to leak pictures if it'll let me
1 hour ago 69 Replies 4 Medals
karremat: i have a question
2 hours ago 54 Replies 2 Medals
D4nniii: how do i work this out
19 hours ago 5 Replies 6 Medals
victoriag: question in the comments
20 hours ago 5 Replies 5 Medals
Gabbsmiles0: Help me
1 day ago 24 Replies 7 Medals
victoriag: HELP ME
1 day ago 24 Replies 2 Medals
TheRealExuse: Solve for x: 5x + 15 = 28
1 day ago 5 Replies 3 Medals
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!