| Exam Board | AQA |
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| Module | Paper 1 (Paper 1) |
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| Year | 2022 |
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| Session | June |
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| Topic | Parametric equations |
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1 A curve is defined by the parametric equations
$$x = \cos \theta \text { and } y = \sin \theta \quad \text { where } 0 \leq \theta \leq 2 \pi$$
Which of the options shown below is a Cartesian equation for this curve?
Circle your answer.
$$\frac { y } { x } = \tan \theta \quad x ^ { 2 } + y ^ { 2 } = 1 \quad x ^ { 2 } - y ^ { 2 } = 1 \quad x ^ { 2 } y ^ { 2 } = 1$$