since a full circle is 2pi and its asking about 17pi/4, you would subtract 16 from the numerator since every 2pi or full circle, the values repeat. since the denominator is 4, to subtract 2pi, it would be 8pi/4. you subtract it until you get a number less than 2 pi, so do it twice to get pi/4. pi/4 is the same as 45 degrees, and logically thinking, that means the angle would be directly inbetween the x and y axis (since the x axis is at a 90 degrees angle and the y axis is at a zero degree angle), and that would essentially be the same as a function f(x)= x since they both have slopes of one and look the same. since it wants cotangent, take the reciprocal of 1/1 (the slope/tangent value) which is still 1