Posted by Anonymous on Thursday, November 18, 2010 at 8:51am.
State the amplitude, period, and phase shift of the function.
h(t)=9cos(7tPie/5)
I got the amplitude and the period. For the phase shift I got (Pie/5)/7 but its wrong. Can someone tell me what I did wrong?

Precalculus  Reiny, Thursday, November 18, 2010 at 10:18am
h(t)=9cos(7tπ/5)
or
h(t)=9cos 7(tπ/35)
the phase shift is π/35 to the right,
your answer of π/5/7 is actually right, except it is not written in good form. It is ambigious, does it mean
(π/5) / 7 or π/(5/7)
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