Lines Matching refs:pi
39 sub pi2 () { 2 * pi }
40 sub pip2 () { pi / 2 }
168 $halfpi = pi/2;
176 B<pi> is also defined as are a few convenience functions for angle
227 The trigonometric constant B<pi> is also defined.
229 $pi2 = 2 * B<pi>;
267 C<tan>, C<sec>, C<tanh>, C<sech>, the argument cannot be I<pi/2 + k *
268 pi>, where I<k> is any integer.
310 The full circle is 2 I<pi> radians or I<360> degrees or I<400> gradians.
311 The result is by default wrapped to be inside the [0, {2pi,360,400}[ circle.
344 Spherical coordinates, I<(rho, theta, pi)>, are three-dimensional
352 pi/2, rho>. In geographical terms I<phi> is latitude (northward
372 reversible because of the equalities like I<pi> angles being equal to
373 I<-pi> angles.
427 subtract your geographical coordinates from I<pi/2> (also known as 90
430 $distance = great_circle_distance($lon0, pi/2 - $lat0,
431 $lon1, pi/2 - $lat1, $rho);
440 The result is in radians, zero indicating straight north, pi or -pi
441 straight south, pi/2 straight west, and -pi/2 straight east.