Cos( 180/7 )* Cos( (4 *180)/7) * Cos( (5*180)/7)

Could anyone help me with this one? I just probably don't know some formula, but google doesn't help me to it

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- October 6th 2005, 10:25 AMLoBTrigonometric formulas urgent help needed
Cos( 180/7 )* Cos( (4 *180)/7) * Cos( (5*180)/7)

Could anyone help me with this one? I just probably don't know some formula, but google doesn't help me to it - October 6th 2005, 04:35 PMhpeQuote:

Originally Posted by**LoB**