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160 #ifndef WCSLIB_WCSTRIG
161 #define WCSLIB_WCSTRIG
165 #include "wcsconfig.h"
168 void sincos(
double angle,
double *sin,
double *cos);
181 #define cosd(X) cos((X)*D2R)
182 #define sind(X) sin((X)*D2R)
183 #define tand(X) tan((X)*D2R)
184 #define acosd(X) acos(X)*R2D
185 #define asind(X) asin(X)*R2D
186 #define atand(X) atan(X)*R2D
187 #define atan2d(Y,X) atan2(Y,X)*R2D
189 #define sincosd(X,S,C) sincos((X)*D2R,(S),(C))
191 #define sincosd(X,S,C) *(S) = sin((X)*D2R); *(C) = cos((X)*D2R);
200 void sincosd(
double angle,
double *sin,
double *cos);
208 #define WCSTRIG_TOL 1e-10
double atan2d(double y, double x)
Polar angle of , in degrees.
double tand(double angle)
Tangent of an angle in degrees.
double acosd(double x)
Inverse cosine, returning angle in degrees.
void sincosd(double angle, double *sin, double *cos)
Sine and cosine of an angle in degrees.
double cosd(double angle)
Cosine of an angle in degrees.
double asind(double y)
Inverse sine, returning angle in degrees.
double atand(double s)
Inverse tangent, returning angle in degrees.
double sind(double angle)
Sine of an angle in degrees.