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* math.c: improve and fix documentation of sin, tan and log

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40852 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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eregon 2013-05-20 10:35:26 +00:00
parent 3786bd6096
commit 46cb75db9b
2 changed files with 13 additions and 9 deletions
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4
ChangeLog
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@ -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> Mon May 20 19:31:49 2013 Benoit Daloze <eregontp@gmail.com>
* lib/logger.rb (Logger::Application): show namespace in documentation * lib/logger.rb (Logger::Application): show namespace in documentation

18
math.c
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@ -105,7 +105,7 @@ math_cos(VALUE obj, VALUE x)
* call-seq: * call-seq:
* Math.sin(x) -> Float * 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. * Returns a Float in the range -1.0..1.0.
* *
* Domain: (−INFINITY, INFINITY) * Domain: (−INFINITY, INFINITY)
@ -129,13 +129,12 @@ math_sin(VALUE obj, VALUE x)
* Math.tan(x) -> Float * Math.tan(x) -> Float
* *
* Computes the tangent of +x+ (expressed in radians). * 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) * 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: * call-seq:
* Math.log(x) -> Float * Math.log(x) -> Float
* Math.log(num, base) -> 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 * 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) * Domain: (0, INFINITY)
* *
* Codomain: (-INFINITY, INFINITY) * Codomain: (-INFINITY, INFINITY)
* *
* Math.log(0) #=> -Infinity
* Math.log(1) #=> 0.0 * Math.log(1) #=> 0.0
* Math.log(Math::E) #=> 1.0 * Math.log(Math::E) #=> 1.0
* Math.log(Math::E**3) #=> 3.0 * Math.log(Math::E**3) #=> 3.0
* Math.log(12,3) #=> 2.2618595071429146 * Math.log(12, 3) #=> 2.2618595071429146
* *
*/ */