Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
Verify the identity.
sin (4u) = 2 sin (2u) cos (2u)
Please help, verifying these kind of equations is tricky for me.
 one year ago
 one year ago
Verify the identity. sin (4u) = 2 sin (2u) cos (2u) Please help, verifying these kind of equations is tricky for me.
 one year ago
 one year ago

This Question is Closed

slaaibakBest ResponseYou've already chosen the best response.1
Hmm. you can try doing it like this: sin(2u + 2u) = sin(2u) * cos(2u) + cos(2u) * sin(2u) = 2sin(2u)*cos(2u) Note: I referred to: sin(A + B) = sinAcosB + cosAsinB
 one year ago

6532bunnyBest ResponseYou've already chosen the best response.0
Oh, I see. Is that the final answer?
 one year ago

6532bunnyBest ResponseYou've already chosen the best response.0
I mean, is that it? Usually these questions take up more space. >_<
 one year ago

slaaibakBest ResponseYou've already chosen the best response.1
I'm pretty sure it is, yes
 one year ago

AravindGBest ResponseYou've already chosen the best response.0
you can also use the identity that \[\bf \large \boxed{\sin 2A= 2\sin A \times \cos A }\]
 one year ago

AravindGBest ResponseYou've already chosen the best response.0
treating \[4u=2 \times (2u) \]
 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.