### Home > CALC > Chapter 9 > Lesson 9.2.2 > Problem9-70

9-70.

Convert the following pairs of parametric equations into rectangular form (in terms of $x$ and $y$).

1. $x =\operatorname{cos} t$ and $y = \operatorname{sin} t$

1. $x =\operatorname{cos}(2t)$ and $y=\operatorname{sin}(2t)$

1. $x = t^4 − 3t^2$ and $y = t^2$

$\operatorname{sin}^2(x) + \operatorname{cos}^2(x) = 1$