mathematical analysis > function > elementary function > trigonometric function > cotangent

mathematical analysis > complex analysis > analytic function > trigonometric function > cotangent

... > mathematical analysis > real analysis > real-valued function > analytic function > trigonometric function > cotangent

... > mathematical analysis > functional analysis > transformation > harmonic analysis > trigonometric function > cotangent

geometry > Euclidean geometry > trigonometry > cotangent