A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 5 years ago
use power reduction formula to rewrite the equation in terms of cosine: cos^6 x
anonymous
 5 years ago
use power reduction formula to rewrite the equation in terms of cosine: cos^6 x

This Question is Closed

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0here u can use some formula like cos 3x = 3cos x  4cos^3x.........(1) cos^2x = (cos2x +1)/2.............(2) ans: cos^6x= (cos^3x)^2 = ( (3cosxcos 3x)/4)^2 =(9co^2x+cos^2 (3x) 6 cos3x* cos x)/16 =[9(1+cos2x)/2 + (1+cos 6x)/2 6cos3x* cos x]/16 =[ 9/32( 1+ cos2x) +1/32( 1+cos 6x)  3/8(cos3x * cos x)

nowhereman
 5 years ago
Best ResponseYou've already chosen the best response.0from wikipedia: \[\cos^n\theta = \frac{1}{2^n} \binom{n}{\frac{n}{2}} + \frac{2}{2^n} \sum_{k=0}^{\frac{n}{2}1} \binom{n}{k} \cos{((n2k)\theta)} \] because n is even. Insert n=6 and ready you are.

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0this u can go for direct.
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.