4 articles trouvés pour ce sujet.
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Triple angle tangent formula |
2007-03-15 |
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sam pose la question :
Hi I am trying to derive a triple angle formulae for tan. I know i need to use compound and double angle formulae but am finding it difficult to "clean" up my fraction to get the triple angle formulae can you show me a worked derivation?! thanks
Penny Nom lui répond. |
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sin(3a), cos(3a) and tan(3a) |
2007-02-28 |
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mailene pose la question :
hi, i...indeed,to..need..your..help
how..cn..i..prove..this,formula???
sin3a=3sina-4sin^3a
cos3a=4cos^3-3cosa
tan3a=3tan-tan^3a /1-3tan^2a
the..symbol...^is..the..expOnent
Haley Ess and Penny Nom lui répond. |
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Finding the missing side of a triangle |
2005-01-20 |
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Jason pose la question :
I found a geometry problem that reads as follows:In triangle ABC,
Penny Nom lui répond. |
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Triple angle formula |
2000-02-23 |
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Sara pose la question :
Can one derive a triple angle formula for sine and cosine? If so, how?
Chris Fisher lui répond. |
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