# Precalculus

Let $\mathcal{G}$ be the graph of the parametric equations
\begin{align*}
x &= \cos(4t),\\
y &= \sin(6t).
\end{align*}What is the length of the smallest interval $I$ such that the graph of these equations for all $t\in I$ produces the entire graph $\mathcal{G}$?

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3. 👁 1,008
1. since cos(4t) has period pi/2
and sin(6t) has period pi/3

the LCM is pi

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2. 👎 0
2. That answer keeps on coming as wrong, I had gotten that answer earlier. I am not sure what is wrong :(

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3. its pi/2

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2. 👎 0

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