Register
Cos3x+cosx=2cos2xcosx
81.7k views
0 votes
Cos3x+cosx=2cos2xcosx

User Yuit
by
7.5k points

1 Answer

5 votes


cos(3x)+cos(x)=2\cdot cos\left((3x+x)/(2)\right)\cdot cos\left((3x-x)/(2)\right)=2\cdot cos(2x)\cdot cos(x).

Green eyes.

User Siegfried Gevatter
by
6.1k points
Ask a Question
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

7.3m questions

9.7m answers

Other Questions

How do you estimate of 4 5/8 X 1/3
Write words to match the expression. 24- ( 6+3)
Please solve the following equation. x-6x=56
whats the most accurate estimation of 65+77
Find the additive inverse of 18/23
Link Copied!