Examples of periodic functions without sin or cos in their formulations?
68171
Non-trigonometric Continuous Periodic Functions
144772
Is there a recurrence relation which has no closed formula?
22750
What are examples of functions that are $L^1$ but not $L^2$ and vice versa?
101281
Does there exist a smooth function which is nowhere analytic?
84846
Convergence of cos, sin, tan functions
116270
Functional equations leading to sine and cosine
82399
Hyperbolic functions. Why are they named with trig functions?
74339
Integrable function whose Fourier transform is not integrable
106477
Fourier Series of "Split" Defined Function
37546
Fourier Series for $|\cos(x)|$
136996
Fourier transform of function composition
109091
Why do non-constant periodic functions have no limit at infinity?
144331
Periodic function implies periodic primitive?
80588
The Fourier transform of a "comb function" is a comb function?
127953
Integral of periodic function over the length of the period is the same everywhere
100436
Examples of nowhere continuous functions
95224
Why does triply periodic univariate function not exist?