Asked by Goke
prove that cos^4 x=(1/8) 3 + 4cos2 x+ cos 4 x using binomial expansion
Answers
Answered by
Steve
just recall that
cos4x = 2cos^2(2x)-1
cos2x = 2cos^2(x)-1
expand and it all works out.
cos4x = 2cos^2(2x)-1
cos2x = 2cos^2(x)-1
expand and it all works out.
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.