A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 4 years ago
how sin2a +cos2a =1
anonymous
 4 years ago
how sin2a +cos2a =1

This Question is Closed

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0what is the question must u prove that the RHS=LHS?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0prove that this question?

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0you mean sin^2 a + cos^2 a = 1.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0What I do is remember how sin and cos can be thought of as coming out of the unit sphere, with certain angles, and forming a right angle triangle from the angle, etc. Then you just have pythagoras' theorem.

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1353754710511:dw

asnaseer
 4 years ago
Best ResponseYou've already chosen the best response.2you can actually prove it on any rightangled triangle by drawing it as follows: dw:1353754910236:dw

asnaseer
 4 years ago
Best ResponseYou've already chosen the best response.2then use definition of sin(theta) and cos(theta) and pythagorus to prove it
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.