I know about the 3 other trig ratios but but my teachers told me that I would learn them later in life, and here I am now learning about them! 😀
I don’t find them difficult, its just learning something new that is almost the same as Sin, cos and tan, I just need a little bit of memorizing such as the :
Cosencant as CSC or COSEC,
Secant as SEC
Cotangent as COT
and also the reciprocal of each trig ratios.