Elements of plane and spherical trigonometry . angle is the reciprocal of thetangent of the angle. Thus, cot A AG AGXBG B,G etc. (8) The secant (sec) of an angle is
Trigonometric identities using Sec, Cosec and Cot | Teaching Resources
cosecant | mathematics | Britannica
How to prove the identity: tan x + cot x = sec x cosecx - Quora