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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Free Documentation License Usage
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of
** this file.  Please review the following information to ensure
** the GNU Free Documentation License version 1.3 requirements
** will be met: http://www.gnu.org/copyleft/fdl.html.
** $QT_END_LICENSE$
**
****************************************************************************/

/*!
    \headerfile <QtCore/qmath.h>
    \title Math Functions
    \ingroup funclists
    \brief The <QtCore/qmath.h> header provides various math functions.
    \pagekeywords math trigonometry qmath floor ceiling absolute sine cosine tangent inverse tan exponent power natural logarithm
*/

/*!
    \fn int qCeil(qreal v)
    Return the ceiling of the value \a v.

    The ceiling is the smallest integer that is not less than \a v.
    For example, if \a v is 41.2, then the ceiling is 42.

    \relates <QtCore/qmath.h>
    \sa qFloor()
*/

/*!
    \fn int qFloor(qreal v)
    Return the floor of the value \a v.

    The floor is the largest integer that is not greater than \a v.
    For example, if \a v is 41.2, then the floor is 41.

    \relates <QtCore/qmath.h>
    \sa qCeil()
*/

/*!
    \fn qreal qFabs(qreal v)
    Returns the absolute value of \a v as a qreal.

    \relates <QtCore/qmath.h>
*/

/*!
    \fn qreal qSin(qreal v)
    Returns the sine of the angle \a v in radians.

    \relates <QtCore/qmath.h>
    \sa qCos(), qTan()
*/

/*!
    \fn  qreal qCos(qreal v)
    Returns the cosine of an angle \a v in radians.

    \relates <QtCore/qmath.h>
    \sa qSin(), qTan()
*/

/*!
    \fn qreal qTan(qreal v)
    Returns the tangent of an angle \a v in radians.

    \relates <QtCore/qmath.h>
    \sa qSin(), qCos()
*/

/*!
    \fn qreal qAcos(qreal v)
    Returns the arccosine of \a v as an angle in radians.
    Arccosine is the inverse operation of cosine.

    \relates <QtCore/qmath.h>
    \sa qAtan(), qAsin(), qCos()
*/

/*!
    \fn qreal qAsin(qreal v)
    Returns the arcsine of \a v as an angle in radians.
    Arcsine is the inverse operation of sine.

    \relates <QtCore/qmath.h>
    \sa qSin(), qAtan(), qAcos()
*/

/*!
    \fn qreal qAtan(qreal v)
    Returns the arctangent of \a v as an angle in radians.
    Arctangent is the inverse operation of tangent.

    \relates <QtCore/qmath.h>
    \sa qTan(), qAcos(), qAsin()
*/

/*!
    \fn qreal qAtan2(qreal y, qreal x)
    Returns the arctangent of a point specified by the coordinates \a y and \a x.
    This function will return the angle (argument) of that point.

    \relates <QtCore/qmath.h>
    \sa qAtan()
*/

/*!
    \fn qreal qSqrt(qreal v)
    Returns the square root of \a v.
    This function returns a NaN if \a v is a negative number.

    \relates <QtCore/qmath.h>
    \sa qPow()
*/

/*!
    \fn qreal qLn(qreal v)
    Returns the natural logarithm of \a v. Natural logarithm uses base e.

    \relates <QtCore/qmath.h>
    \sa qExp()
*/

/*!
    \fn qreal qExp(qreal v)
    Returns the exponential function of \c e to the power of \a v.

    \relates <QtCore/qmath.h>
    \sa qLn()
*/

/*!
    \fn qreal qPow(qreal x, qreal y)
    Returns the value of \a x raised to the power of \a y.
    That is, \a x is the base and \a y is the exponent.

    \relates <QtCore/qmath.h>
    \sa qSqrt()
*/