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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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
Use the product identity for the cosine.Quote:
Originally Posted by LoB
