What’s the vertex of g(x) =(x-2)^2-3

Plz me plzzzzzzz i need and plz delte this after answer

(a) compute the maclaurin polynomial m2(x) for f(x) = cos x. (b) use the polynomial of part (a) to estimate cos π 12. (c) use a calculator to compute the error made using the estimate from part (b) for the value of cos π 12. remember that the error is defined to be the absolute value of the difference between the true value and the estimate.

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.