Find sin 2x, cos 2x, tan 2x given that cos x=−( ​5/13 ), π /2​ < x< π

Need on this geometry question. explain how you did it.

Sketch one cycle if the cosine function y=2cos2theta

For the quadratic function [tex]y=(x+4)^2-1[/tex] , do the following: a) rewrite the function in the standard form, b) rewrite the function in intercept form, c) find the vertex, d) find the y-intercept, e) find the x-intercepts.