Asked by lola

I have a couple of these and cannot locate directions I can understand-please help! Draw the graph of y=3cos(2x) for 0< or= x < or = 2 pi
Answered by Damon
http://www.wolframalpha.com/input/?i=y+%3D+3+cos+%28+2+x%29

put in y = 3 cos (2x)
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