CC78K0S Datasheet, PDF (256/520 Pages) NEC – C Compiler Ver.1.30 or Later Language

CHAPTER 10 LIBRARY FUNCTIONS
7-7 tan (normal model only)
Mathematical Functions
FUNCTION
tan finds tan.
HEADER
math.h
FUNCTION PROTOTYPE
double tan (double x) ;
Function
tan
Arguments
x ... Numeric value on which
operation is performed
Return Value
Normal ... tan of x
When x = NaN, x = ±∞ ... NaN
When underflow occurs ...
Non-normalized number
EXPLANATION
• Calculates tan of x.
• If x is non-numeric, NaN is returned.
• If x is infinite, NaN is returned and EDOM is set to errno.
• If an underflow occurs as a result of operation, a non-normalized number is returned.
• If the absolute value of x is extremely large, the result of an operation becomes an almost meaningless value.
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User’s Manual U14872EJ1V0UM