Express 13 pi/6 as a function of an angle in quadrant i

For this case, the first thing you should do is to know the following transformation:

pi radians = 180 degrees

Applying the transformation we have:

(13pi / 6) * (180 / pi) = 390 degrees

Then, in quadrant 1 we have:

390 - 360 = 30 degrees

Answer:

13 pi / 6 as a function of an angle in quadrant i is:

30 degrees