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Standard trigonometric functions with angles in degrees.
-
sinDeg( theta )
- Sine of an angle.
-
cosDeg( theta )
- Cosine of an angle.
-
tanDeg( theta )
- Tangent of an angle.
-
asinDeg( x )
- Arc sine.
The result is in the range of -90 through 90.
-
acosDeg( x )
- Arc cosine.
The result is in the range of 0.0 through 180.
-
atanDeg( x )
- Arc tangent.
The result is in the range of -90 through 90.
-
atan2Deg( y, x )
- Converts rectangular coordinates (
x
,y
)
to polar (r
,theta
).
This method computes the phase
theta
by computing an arc tangent
of y/x
in the range of -180 to 180.
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TOPCAT - Tool for OPerations on Catalogues And Tables
Starlink User Note253
TOPCAT web page:
http://www.starlink.ac.uk/topcat/
Author email:
m.b.taylor@bristol.ac.uk
Mailing list:
topcat-user@jiscmail.ac.uk