Which transformations are needed to change the parent cosine function to y=3cos(10(x-pi))

is a translation to the right (along the x-axis) by 'n' units

is a stretch horizontally by scale factor 1/n

is a stretch vertically by scale factor of n

So  is a translation of  by  to the right, and then stretched on the x-axis by scale factor  and lastly stretched on the y-axis by scale factor of 

D. Vertical angles

Step-by-step explanation:

BAC and EAF are vertical angles.

Correct choice is D.

See attached picture