Inverse trig q (1 Viewer)

[tanna]

Consider the functions y=-cos^-1(x) and y=2tan^-1(x-1)
i) Show that the graphs of these functions intersect on the y-axis
ii) Show that the graphs have a common tangent at this point of intersection

 

[Drongoski]

 

[tanna]

Thank you
Much appreciated!