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infoWhy this? Parametric equations describe curves by expressing coordinates in terms of a shared parameter, offering a useful representation of paths and motion. Product, quotient, and chain rules extend differentiation to more complex combinations of functions, allowing us to analyse a wider range of changing relationships.

scheduleWhy now? The preceding study of functions supports the interpretation of parametric representations and the identification of composite functions. With algebra, trigonometric functions, and earlier calculus established, we can develop general differentiation rules before applying them to more demanding curve analysis and optimisation.