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### B.1.1 TrigDegrees

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@bristol.ac.uk