C99 Language Standard
Contents
Foreword
Introduction
1. Scope
2. Normative references
3. Terms, definitions, and symbols
4. Conformance
5. Environment
6. Language
7. Library
Annex A
Annex B
Annex C
Annex D
Annex E
Annex F
F.1 Introduction
F.2 Types
F.3 Operators and functions
F.4 Floating to integer conversion
F.5 Binary-decimal conversion
F.6 Contracted expressions
F.7 Floating-point environment
F.8 Optimization
F.9 Mathematics <math.h>
F.9.1 Trigonometric functions
F.9.1.1 The acos functions
F.9.1.2 The asin functions
F.9.1.3 The atan functions
F.9.1.4 The atan2 functions
F.9.1.5 The cos functions
F.9.1.6 The sin functions
F.9.1.7 The tan functions
F.9.2 Hyperbolic functions
F.9.3 Exponential and logarithmic functions
F.9.4 Power and absolute value functions
F.9.5 Error and gamma functions
F.9.6 Nearest integer functions
F.9.7 Remainder functions
F.9.8 Manipulation functions
F.9.9 Maximum, minimum, and positive difference functions
F.9.10 Floating multiply-add
Annex G
Annex H
Annex I
Annex J
Bibliography
C99 Language Standard
Annex F
F.9 Mathematics <math.h>
F.9.1 Trigonometric functions
F.9.1.3 The atan functions
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F.9.1.3 The atan functions
1
atan((+-)0) returns (+-)0.
atan((+-)(inf)) returns (+-)pi /2.