A community for students.
Here's the question you clicked on:
 0 viewing
bwoyak
 one year ago
How do you answer y=sin(x) for angle 90, 60, and 45 degrees?
bwoyak
 one year ago
How do you answer y=sin(x) for angle 90, 60, and 45 degrees?

This Question is Open

DebbieG
 one year ago
Best ResponseYou've already chosen the best response.0I guess you mean: sin(90)= ? sin(60)= ? sin(45)= ? It kind of depends on what methods you have covered. If your teacher is stressing the unit circle, then those are on there, so you would look at the ycoordinate of each point of intersection with the circle. Alternatively, for 90 you have a quadrantal angle. since \(\sin\alpha=y/r\) then you have to notice that, for any point on the negative side of the yaxis, y/r=1. For the other two, those are not quadrantal so I would use their reference angles to find the function values. Sine is negative in Q4, so you have: sin(60)=sin(60) And sin(45)=sin(45) For sin(60) and sin(45) then, you could use SOHCAHTOA with the appropriate "special triangle": dw:1380883307004:dw
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.