I need help with my Algebra test. (Factoring Trinomials)
I'm a freshmen. If you're willing to help respond to this, please.

Pls , the question is in the picture!

If the measure of xyz is 81 what is the measure of yz

(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.