A community for students.
Here's the question you clicked on:
 0 viewing
calyne
 3 years ago
show me how to calculate sin(3pi/4)
calyne
 3 years ago
show me how to calculate sin(3pi/4)

This Question is Closed

Dockworker
 3 years ago
Best ResponseYou've already chosen the best response.0you want to get the reference angle, that is the first quadrant angle that has the same value, maybe varying only by sign

Dockworker
 3 years ago
Best ResponseYou've already chosen the best response.0we know the sign is positive in the 2nd quadrant and in the first quadrant

Dockworker
 3 years ago
Best ResponseYou've already chosen the best response.0so this question is the exact same thing as sin(3pi/4pi/2)

Dockworker
 3 years ago
Best ResponseYou've already chosen the best response.0think of the unit circle with radius 1, what would the yvalue need to be with respect to the radius for theta to be pi/4?

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1333508390565:dw So \[\sin\frac{3\pi}{4}=\sin\frac{\pi}{4}=\frac{\sqrt{2}}{2}\]
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.