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Graph the curve $x=\sin(t) + \sin(1.5 t), y=\cos(t)$ and find its length correct to four decimal places

I tried Parametric Plot but it keeps telling me there's arguments against it.

ParametricPlot[{Sin[t] + Sin[1.5 t], Cos[t]}, {t, 0, 2 π}] is what I was trying.

MarcoB
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user46577
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  • what about the arc length part? – user46577 Feb 13 '17 at 05:05
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1 Answers1

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You are missing a comma separating the equations from the varied term:

ParametricPlot[{x = Sin[t] + Sin[1.5 t], y = Cos[t]} , {t, 0, 2 Pi}]

Use ArcLength 

ArcLength[{x = Sin[t] + Sin[1.5 t], y = Cos[t]} , {t, 0, 2 Pi}]

8.35512

Young
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