A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing

This Question is Closed

malexander
 2 years ago
Best ResponseYou've already chosen the best response.0cos(x+y)=cosxacosysinxsiny cos(xy)=cosxcosy+sinxsiny addition produces 2cosxcosy

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.1take the left hand side...do you know the formula for sin(x+y) and sin(xy)?

kaisan
 2 years ago
Best ResponseYou've already chosen the best response.0i think so but i'm not sure

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.1sin(x+y) = sinxcosy + sinycosx sin(xy) = sinxcosy  sinycosx can you do it from here?

kaisan
 2 years ago
Best ResponseYou've already chosen the best response.0it looks familiar but i can't figure it out. is it one of the cosine identities?

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.1no...you substitute those into your problem sin(x+y)  sin (xy) = sinxcosy + cosxsiny  (sinxcosy  cosxsiny)

kaisan
 2 years ago
Best ResponseYou've already chosen the best response.0how to do all of this in general

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.1basically you memorize the identities...

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.1i did not do anything fancy...all i did was substitute identities

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.1so regarding this problem...you're good?

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.1sinxcosy + cosxsiny  (sinxcosy  cosxsiny) sinxcosy = cosxsiny  sinxcosy + cosxsiny

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.1that's a + not an =

kaisan
 2 years ago
Best ResponseYou've already chosen the best response.0i don't understand what you did

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.1i distributed the minus sign

lgbasallote
 2 years ago
Best ResponseYou've already chosen the best response.1so you're good now?
Ask your own question
Ask a QuestionFind 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.