Hello!

I need help figuring out the Taylor series..I keep getting undetermined form in these functions..Please help!

Q1) Suppose f(x) = cos(2x) is replaced by its Taylor Polynomial P2(X) about the point X(0) = pi/2 on the interval 0<= x <= pi. Estimate the error?

Q2) Derive the Taylor Series for f(x) = ln(1+x) with X(0) = 0 and determine for which value of X the series converges.

Thanks!