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- MathsIsFun
- 2005-12-15 07:29:52
Me only contribution, mateys, is this ere lubberly sketch-ning
- Chaotic Neutral
- 2005-12-15 06:51:34
Aye aye, captain Rottingham! Calculators at deck, rrreform in rradials if ye think it will make ye life easier.
- mathsyperson
- 2005-12-15 06:02:19
I didn't know it be talk like a pirate day. Yarr!
That scurvy dog, ryos, be correct. There be no identity that will rescue ye, landlubber.
At least, none that me or my parrot know. Arr!
- ryos
- 2005-12-15 05:19:28
Those angles be not on the unit circle, matey. Aaargh!
Ahem. I don't think they have coterminal angles on the unit circle, either.
Which means...use a calculator! Right? Don't tell me there's a goofy trig identity that will come to the rescue. I hates trig identities.
- Honore
- 2005-12-15 00:39:15
Hello,
Since I could not solve the following equation though applying all information I have about trigonometry, I would very appreciate if anybody could help or make some suggestion. Thanks for your time.
cos(2pi/11)+cos(4pi/11)+cos(6pi/11)+cos(8pi/11)+cos(10pi/11)=?
(Answer: -1/2)