# Chapter 9 - Section 9.5 - Parametric Equations - Concept and Vocabulary Check - Page 1019: 3

$sin(t)$, $cos(t)$, $sin^2t+cos^2=1$

#### Work Step by Step

With the given pair of parametric equations, we can isolate $sin(t)$ and $cos(t)$, use the identity $sin^2t+cos^2=1$, and add the square of the two isolated equations to eliminate the parameter $t$.

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