Can someone help me.. please (Crying)

What's the graph of:

1. -cos2x

2. 2cos(3x+pi/2)

thanks..(Bow)

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- Jan 10th 2012, 06:21 AMtintin22Graph of Trigo Func.
Can someone help me.. please (Crying)

What's the graph of:

1. -cos2x

2. 2cos(3x+pi/2)

thanks..(Bow) - Jan 10th 2012, 08:59 AMAckbeetRe: Graph of Trigo Func.
WolframAlpha to the rescue. Although, these are straight-forward enough plots that you should be able to do them without technology. You need to know how scaling affects a function, both in the independent and dependent variable. You also need to know how an offset affects a function, both in the independent and dependent variable.