Asked by Sinachi
Find Φ given that 2cos^2Φ=3+5cosΦ and 0<Φ<360
Answers
Answered by
oobleck
2cos^2Ø - 5cosØ - 3 = 0
(2cosØ+1)(cosØ-3) = 0
cosØ = -1/2 or 3
since |cosØ| <= 1, the only solution is
cosØ = -1/2, so
Ø = 120° or 240°
(2cosØ+1)(cosØ-3) = 0
cosØ = -1/2 or 3
since |cosØ| <= 1, the only solution is
cosØ = -1/2, so
Ø = 120° or 240°
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.