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HALF_PI | Constant |
math.h, timath.h |
#define HALF_PI (1.570796326794897) |
A constant with value PI/2.
HALF_PI is a predefined floating point constant which approximates PI/2 up to
16 significant digits, i.e. 1.570796326794897
.
Of course, it is the same as PI/2.0
.