How to separate real and imaginary parts of $\arccos(x+iy)$?
136287
Separate real and imaginary part of $\arccos(z)$
109331
Evaluating Real and Imaginary parts in a dispersion equation via ContourPlot
83359
Complex number identity by trigonometry
143949
How to get nth derivative of $\arcsin x$
71605
Chopping matrix elements, real or imaginary
59658
Are $\mathrm{arccot}(x)$ and $\arctan(1/x)$ the same function?
128258
Why aren't the graphs of $\sin(\arcsin x)$ and $\arcsin(\sin x)$ the same?
33791
Is it generally true that $\arcsin \theta + \arccos \theta = \frac{\pi}{2}$?
1859
Proving $\arctan(\sqrt{x^2+1}-x)=\frac{\pi}{4}-\frac{1}{2}\arctan(x)$
104453
A question about the arctangent addition formula.
95108
Alternative form of ArcSin[Sin[x]]
47168
PDE separation of variables
111976
Prove that a product of two complex numbers has zero imaginary part
68504
Compute $\int_0^1 \frac{\arcsin(x)}{x}dx$
137045
The estimate of real and imaginary part of a holomorphic function
115128
How do I show this $\cos^2(\arctan(x))=\frac{1}{1+x^2}$
76490
Proving that $\cos(\arcsin(x))=\sqrt{1-x^2}$