Okay, so I know that the tan(0 deg) and tan(180 deg) (or 0 rad and pi rads) are both 0, so wouldn't the cot of those be undefined since it's the reciprocal of the tan? The answer says pi/2 though.
Okay, so I know that the tan(90 deg) and tan(270 deg) (or pi/2 and 3pi/4 rads) are both 0, so wouldn't the cot of those be undefined since it's the reciprocal of the tan? The answer says pi/2 though.