A community for students.
Here's the question you clicked on:
← 55 members online
 0 viewing
nikkinicholaou
 2 years ago
Verify the identity.
sin 4x = 2 sin 2x cos 2x
nikkinicholaou
 2 years ago
Verify the identity. sin 4x = 2 sin 2x cos 2x

This Question is Open

mebs
 2 years ago
Best ResponseYou've already chosen the best response.1sin(4x) = sin( 2x + 2x) Recall that sin( A +B) = sin(A)cos(B) + cos(A)sin(B) so it is = sin2xcos2x + sin2xcos2x

mebs
 2 years ago
Best ResponseYou've already chosen the best response.1can you figure out the rest?

nikkinicholaou
 2 years ago
Best ResponseYou've already chosen the best response.0What else do i do?

mebs
 2 years ago
Best ResponseYou've already chosen the best response.1what else is there to do other than add it ?

nikkinicholaou
 2 years ago
Best ResponseYou've already chosen the best response.0I dont know!! haha

mebs
 2 years ago
Best ResponseYou've already chosen the best response.1haha well did I verify it ..now your done!

nikkinicholaou
 2 years ago
Best ResponseYou've already chosen the best response.0thank you so extremely much. :)

cambrige
 2 years ago
Best ResponseYou've already chosen the best response.1U can use the identity sin2y=2sinycosy!! and take sin4x=sin2(2x) where take 2x as y and 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.