Find the norder taylor polynomials of the given function f(x)=cosx

We have already seen how to approximate a function using its tangent line. This was the key idea in Euler’s method. If we know the function value at some point (say f (a)) and the value of the derivative at the same point (f (a)) we can use these to find the tangent line, and then use the tangent line to approximate f (x) for other points x. Of course, this approximation will only be good when x is relatively near a. The tangent line approximation of f (x) for x near a is called the first degree Taylor Polynomial of f (x) and is: f (x) ≈ f (a) + f (a)(x − a)