Asked by lindsay
Simplify
cos Theta/4 cos theta/4 - sin theta/4 sin theta/4.
cos Theta/4 cos theta/4 - sin theta/4 sin theta/4.
Answers
Answered by
Reiny
recall
cos 2A = cos^2 A - sin^2 A
you have that pattern
cos(Ø/4)cos(Ø/4) - sin(Ø/4)sin(Ø/4)
= cos^2 (Ø/4) - sin^2 (Ø/4)
= cos (Ø/2)
cos 2A = cos^2 A - sin^2 A
you have that pattern
cos(Ø/4)cos(Ø/4) - sin(Ø/4)sin(Ø/4)
= cos^2 (Ø/4) - sin^2 (Ø/4)
= cos (Ø/2)
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.