Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
pottersheep
Group Title
Trig Identities....Half Angles help PLEASEEEEE!!!
Can someone explain what the teacher wrote on the board for me please???
Cos2A = cos^2Asin^2A
= 1  2sin^2 A (What happened here???????)
 one year ago
 one year ago
pottersheep Group Title
Trig Identities....Half Angles help PLEASEEEEE!!! Can someone explain what the teacher wrote on the board for me please??? Cos2A = cos^2Asin^2A = 1  2sin^2 A (What happened here???????)
 one year ago
 one year ago

This Question is Closed

Rezz5 Group TitleBest ResponseYou've already chosen the best response.1
sin^2 + cos^2 =1
 one year ago

Rezz5 Group TitleBest ResponseYou've already chosen the best response.1
1cos^2==sin^2
 one year ago

Rezz5 Group TitleBest ResponseYou've already chosen the best response.1
sub in ... Cos2A=cos^2A1+cos^2A
 one year ago

Rezz5 Group TitleBest ResponseYou've already chosen the best response.1
Cos2A=2cos^2A 1
 one year ago

Rezz5 Group TitleBest ResponseYou've already chosen the best response.1
now do same thing with 1sin^2= cos^2 and you should get the identity you teacher wrote sooooo 1sin^2=cos^2 sub into Cos2A = cos^2Asin^2A Cos2A=1sin^2Asin^A ==12sin^2A
 one year ago

pottersheep Group TitleBest ResponseYou've already chosen the best response.0
HMmm let me process what you said
 one year ago

pottersheep Group TitleBest ResponseYou've already chosen the best response.0
Thank you! I finally get it!
 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.