793. All trigonometric functions have a period of $2 \pi$ (or $360^{\circ}$); which of them have a smaller period?
793. It is enough to cast a glance at the graphical representation of trigonometric functions on a circle with a radius equal to one (or to reproduce this image in one's mind) to see that the tangent and cotangent have a period of $\pi$ (or $180^{\circ}$).