Asked by Maria
Hi i have two questions:
what is the exact value of cos 5(pie)/12?
what is the exact value of cos2(pie)/9 cos(pie)/18 + sin2(pie)/9 sin(pie)/18?
thank you
what is the exact value of cos 5(pie)/12?
what is the exact value of cos2(pie)/9 cos(pie)/18 + sin2(pie)/9 sin(pie)/18?
thank you
Answers
Answered by
Steve
first of all, the name of the Greek letter is <b>pi</b> not pie.
cos 5π/12 = (√3-1) / 2√2
cos2π/9 cosπ/18 + sin2π/9 sinπ/18 = cos(2π/9 - π/18) = cos π/6 = √3/2
cos 5π/12 = (√3-1) / 2√2
cos2π/9 cosπ/18 + sin2π/9 sinπ/18 = cos(2π/9 - π/18) = cos π/6 = √3/2
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.