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One item is filed under this topic.
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sin(3a), cos(3a) and tan(3a) |
2007-02-28 |
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From mailene:
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
Answered by Haley Ess and Penny Nom. |
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