diff options
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | math.c | 18 |
2 files changed, 13 insertions, 9 deletions
@@ -1,3 +1,7 @@ +Mon May 20 19:33:55 2013 Benoit Daloze <eregontp@gmail.com> + + * math.c: improve and fix documentation of sin, tan and log + Mon May 20 19:31:49 2013 Benoit Daloze <eregontp@gmail.com> * lib/logger.rb (Logger::Application): show namespace in documentation @@ -105,7 +105,7 @@ math_cos(VALUE obj, VALUE x) * call-seq: * Math.sin(x) -> Float * - * Computes the cosine of +x+ (expressed in radians). + * Computes the sine of +x+ (expressed in radians). * Returns a Float in the range -1.0..1.0. * * Domain: (−INFINITY, INFINITY) @@ -129,13 +129,12 @@ math_sin(VALUE obj, VALUE x) * Math.tan(x) -> Float * * Computes the tangent of +x+ (expressed in radians). - * Returns a Float in the range -1.0..1.0. * - * Domain: n * (-PI/2, PI/2) + * Domain: (−INFINITY, INFINITY) * * Codomain: (−INFINITY, INFINITY) * - * Math.tan(5 * (Math::PI/2)) #=> 3266247870639074.0 + * Math.tan(0) #=> 0.0 * */ @@ -418,21 +417,22 @@ math_exp(VALUE obj, VALUE x) /* * call-seq: - * Math.log(x) -> Float - * Math.log(num, base) -> Float + * Math.log(x) -> Float + * Math.log(x, base) -> Float * - * Returns the natural logarithm of +x+. + * Returns the logarithm of +x+. * If additional second argument is given, it will be the base - * of logarithm. + * of logarithm. Otherwise it is +e+ (for the natural logarithm). * * Domain: (0, INFINITY) * * Codomain: (-INFINITY, INFINITY) * + * Math.log(0) #=> -Infinity * Math.log(1) #=> 0.0 * Math.log(Math::E) #=> 1.0 * Math.log(Math::E**3) #=> 3.0 - * Math.log(12,3) #=> 2.2618595071429146 + * Math.log(12, 3) #=> 2.2618595071429146 * */ |