trig
posted by mohamed sedeeq .
cos^4 15sin^4 15 with out using calculator

I wonder if you have learned the power reduction formulas...
Powerreduction formulas see http://en.wikipedia.org/wiki/List_of_trigonometric_identities
posted by mohamed sedeeq .
cos^4 15sin^4 15 with out using calculator
I wonder if you have learned the power reduction formulas...
Powerreduction formulas see http://en.wikipedia.org/wiki/List_of_trigonometric_identities