What is your best way to memorize results for common arguments of trigonometric functions?
75570
Easy way of memorizing values of sine, cosine, and tangent
95108
Alternative form of ArcSin[Sin[x]]
71807
Defining a function by equations with different number of arguments
31575
Solving trigonometric equations of the form $a\sin x + b\cos x = c$
19083
Do you use degrees or radians for trig functions?
96963
Naming arguments in Wolfram functions?
24262
Best and shortest way to evaluate mathematical expressions
143857
How to prove absolute summability of sinc function?
82027
How to derive compositions of trigonometric and inverse trigonometric functions?
111108
How to generate a table of trigonometric functions that can be broken across pages?
67988
Trigonometric curiosity
106222
A good way to retain mathematical understanding?
3247
How can I find the number of arguments of a Python function?
18967
Linear independence of $\sin(x)$ and $\cos(x)$
4979
Why do we need so many trigonometric definitions?
4676
Notation for repeated composition of functions
135225
How to find the period of the sum of two trigonometric functions