What is Maclaurin series?Is ituseful in finding values of sin ,cos ,and tan ?

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A Maclaurin series is a power series that allows one to calculate an approximation of a function f ( x ) for input values close to zero, given that one knows the values of the successive derivatives of the function at zero. In many practical applications, it is equivalent to the function it represents.
Values ofsin ,cos ,and tan can be found using its expansion series,

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