CC78K4 Datasheet, PDF (258/523 Pages) NEC – CC78K4 Ver.2.30 or Later, C Compiler Language

CHAPTER 10 LIBRARY FUNCTIONS
7-26 atanf
Mathematical Functions
FUNCTION
atanf finds atan.
HEADER
math.h
FUNCTION PROTOTYPE
float atanf (float x);
Function
atanf
Arguments
x ... Numeric value to perform
operation
Return Value
Normal ... atan of x
When x = NaN ... NaN
When x = –0 ... –0
EXPLANATION
• Calculates atan (range between –π/2 and +π/2) of x
• If x is non-numeric, NaN is returned.
• If x = –0, –0 is returned.
• If an underflow occurs as a result of the operation, a non-normalized number is returned.
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User’s Manual U15556EJ1V0UM