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casinf, casin, casinl
From cppreference.com
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c
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numeric
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complex
C
Compiler support
Language
Headers
Type support
Program utilities
Variadic function support
Error handling
Dynamic memory management
Strings library
Algorithms
Numerics
Date and time utilities
Input/output support
Localization support
Concurrency support
(C11)
Technical Specifications
Symbol index
[edit]
Numerics
Common mathematical functions
Floating-point environment
(C99)
Pseudo-random number generation
Complex number arithmetic
(C99)
Type-generic math
(C99)
Bit manipulation
(C23)
Checked integer arithmetic
(C23)
[edit]
Complex number arithmetic
Types and the imaginary constant
complex
(C99)
_Complex_I
(C99)
CMPLX
(C11)
imaginary
(C99)
_Imaginary_I
(C99)
I
(C99)
Manipulation
cimag
(C99)
creal
(C99)
carg
(C99)