lz_arctangent
The angle whose tangent is the number.
long lz_arctangent( CLZNumber* leftOperand, CLZNumber* targetNumber = nullptr );The angle in (−π/2, π/2) whose tangent is the operand, correctly rounded in the thread's unit; arctan 1 is exactly 45°. A very large operand gives an angle a hair short of π/2.
Examples
| Call | Answer |
|---|---|
lz_arctangent( 1 ) | 0.785398163397448309615660845819875721 |
lz_arctangent( 1 ) degrees | 45 |
lz_arctangent( 1E30 ) | 1.570796326794896619231321691638751442 |
Each answer is what Addaptic printed for the call, in radians, at 36 places unless a setting is shown.
Returns
kNoError (0) when the answer is written. Otherwise an error code, with the answer flagged infinite or not-a-number; see Errors and flags.
See also
lz_tangentThe tangent of an angle.lz_arctangent2The angle of the point (x, y), with y first, as C's atan2 takes them.lzc_arctangentThe principal arctangent of a complex number.