Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
nimamiz
Group Title
If cos(t)=−3/5 where pi<t<3pi/2, find the values of the following trigonometric functions.
Cos(t/2)
Sin(t/2)
I found the answers but for some reason Cos is negative and sin is positive. Aren't they both supposed to be negative?
 one year ago
 one year ago
nimamiz Group Title
If cos(t)=−3/5 where pi<t<3pi/2, find the values of the following trigonometric functions. Cos(t/2) Sin(t/2) I found the answers but for some reason Cos is negative and sin is positive. Aren't they both supposed to be negative?
 one year ago
 one year ago

This Question is Closed

myininaya Group TitleBest ResponseYou've already chosen the best response.1
Well if pi<t<3pi/2 then pi/2<t/2<3pi/4 And that area of the rectangular coordinate system, cos is negative and sin is positive since x is negative and y is positive there.
 one year ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
I just took the inequality given and divided by 2. t/2 is between pi/2 and 3pi/4
 one year ago

nimamiz Group TitleBest ResponseYou've already chosen the best response.0
ohh. got it thanks buddy
 one year ago
See more questions >>>
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.