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February 1, 2015

February 1, 2015

Posted by **jona** on Tuesday, July 21, 2009 at 3:23pm.

- math -
**Reiny**, Tuesday, July 21, 2009 at 5:01pmthe basic curve y = cos x

has symmetry about the y-axis

the 3 only affects the amplitude and the +1 just lifts everything up.

so there is symmetry about the y-axis

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