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cosec

Posted: 18/04-2011 19:04
by AMM
demonstrer den exakte verdien av:

a) sec- [symbol:pi] / 12

b) cot5 [symbol:pi] /12

c) cosec19 [symbol:pi] /12

Posted: 19/04-2011 12:03
by Integralen
Plott inn disse hit:
www.wolframalpha.com