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签到天数: 12 天 连续签到: 1 天 [LV.3]偶尔看看II
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发表于 2009-7-14 20:37
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来自: 中国山东济南
本帖最后由 辟尘 于 2009-7-14 20:52 编辑
刚才看到的一段话:
If you do not specify units, all trigonometric functions interpret their arguments as
radians. Likewise, inverse trigonometric functions' return values are in given in radians.
When the argument to a trigonometric expression is a variable, the units are assumed to
be radians. If you want values interpreted in degrees, supply the argument with the unit
name deg.
All trigonometric expressions expect their arguments to be in radians, and the inverse trigonometric
functions' return values are in radians (although the user interface often converts them to degrees
automatically). These function names are reserved and may not be used as variable names |
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