Applies ToSharePoint Server 订阅版 SharePoint Server 2019 SharePoint Server 2016 SharePoint Server 2013 SharePoint Server 2013 企业版 Microsoft 365 中的 SharePoint SharePoint Foundation 2010 SharePoint Server 2010 Microsoft 365 小型企业版中的 SharePoint Windows SharePoint Services 3.0

Returns the arctangent, or inverse tangent, of the specified x- and y-coordinates. The arctangent is the angle from the x-axis to a line containing the origin (0, 0) and a point with coordinates (x_num, y_num). The angle is given in radians between -pi and pi, excluding -pi.

Syntax

ATAN2(x_num,y_num)

X_num     is the x-coordinate of the point.

Y_num     is the y-coordinate of the point.

Remarks

  • A positive result represents a counterclockwise angle from the x-axis; a negative result represents a clockwise angle.

  • ATAN2(a,b) equals ATAN(b/a), except that a can equal 0 in ATAN2.

  • If both x_num and y_num are 0, ATAN2 returns the #DIV/0! error value.

  • To express the arctangent in degrees, multiply the result by 180/PI( ) or use the DEGREES function.

Examples

Formul a

Description (Result)

=ATAN2(1, 1)

Arctangent of the point 1,1 in radians, pi/4 (0.785398)

=ATAN2(-1, -1)

Arctangent of the point -1,-1 in radians, -3*pi/4 (-2.35619)

=ATAN2(-1, -1)*180/PI()

Arctangent of the point 1,1 in degrees (-135)

=DEGREES(ATAN2(-1, -1))

Arctangent of the point 1,1 in degrees (-135)

需要更多帮助?

需要更多选项?

Explore subscription benefits, browse training courses, learn how to secure your device, and more.

Communities help you ask and answer questions, give feedback, and hear from experts with rich knowledge.