度不是弧度 [英] degrees not radians

问题描述

是否可以将数学函数设置为使用度数而不是

弧度？


我正在计算一些天文计算，一切都是在

度。所有这些转变让我有点疯狂！


Jeff

解决方案

" Jeff Thies" <无**** @ nospam.net>写道：

是否可以将数学函数设置为使用度数而不是弧度？
我正在计算一些天文计算，一切都在
中度。所有这些转换让我有点疯狂！

Nope。


仅在输入和输出时进行转换，并且将所有

中间结果存储在弧度测量中。


您可以定义一些辅助函数。请注意，我不知道是否已经犯了任何浮点滥用的罪行。


// m是一个角度以度为单位的度量

函数弧度（m）{return m * Math.PI / 180.0; }


// m是以弧度表示的角度度量

函数度（m）{return m * 180.0 / Math.PI; }


然后，如果你真的很绝望，你可以定义自己的

变体函数：


// m是以度为单位的角度度量

定义cosD（m）{返回Math.cos（弧度（m））; }


但是不断转换和返回
转换并不是一个好主意。就像我说的那样，仅在输入和输出时进行转换。


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Chris Jeris cj **** @ oinvzer.net 向域名申请（1 6 2 4）（3 7）回复。

>然后，如果你真的很绝望，你可以定义自己的

变体函数：

// m是以度为单位的角度度量
define cosD（m）{return Math.cos（弧度（米））; }


我喜欢这个想法，但不能让它发挥作用。我收到一个错误：


缺失;在声明之前。 （在定义之后）

但是不断转换和回转转换并不是一个好主意。就像我说的那样，仅在输入和输出时进行转换。


我希望！我做得不够聪明！曾经看过月亮的位置计算？
我觉得没什么好摆弄的！


欢呼，

杰克

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Chris Jeris cj****@oinvzer.net 向域名申请（1 6 2 4）（3 7）以进行回复。

" Jeff Thies" <无**** @ nospam.net>写道：

// m是以度为单位的角度度量
定义cosD（m）{return Math.cos（radians（m））; }

我喜欢这个想法，但不能让它发挥作用。我收到一个错误：
失踪;在声明之前。 （在定义之后）

这是我有一个Scheme braino。将''define''替换为''function''。


-

Chris Jeris cj **** @ oinvzer.net 申请（1 6 2 4）（3 7）到域名回复。

Is it possible to set the Math functions to use degrees instead of
radians?

I''m working out some astronomical calculations and everything is in
degrees. All those conversions are driving me a bit crazy!

Jeff

解决方案

"Jeff Thies" <no****@nospam.net> writes:

Is it possible to set the Math functions to use degrees instead of
radians?
I''m working out some astronomical calculations and everything is in
degrees. All those conversions are driving me a bit crazy!

Nope.

Do your conversion only at input and output, and store all your
intermediate results in radian measure.

You could define some helper functions. Note that I don''t know
whether I''ve committed any sins of floating-point-misuse here.

// m is an angle measure in degrees
function radians(m) { return m * Math.PI / 180.0; }

// m is an angle measure in radians
function degrees(m) { return m * 180.0 / Math.PI; }

Then if you were really desperate you could define your own
variant functions:

// m is an angle measure in degrees
define cosD(m) { return Math.cos(radians(m)); }

but it is not a good idea to be constantly converting and back-
converting. Like I said, convert only at input and output.

--
Chris Jeris cj****@oinvzer.net Apply (1 6 2 4)(3 7) to domain to reply.

> Then if you were really desperate you could define your own

variant functions:

// m is an angle measure in degrees
define cosD(m) { return Math.cos(radians(m)); }
I like that idea but can''t get it to work. I''m getting an error:

missing ; before statement. (after the define)

but it is not a good idea to be constantly converting and back-
converting. Like I said, convert only at input and output.
I wish! I''m not smart enough to do that! Ever look at the calculations for
the Moon''s position? It''s nothing I feel like tinkering with!

Cheers,
Jeff

--
Chris Jeris cj****@oinvzer.net Apply (1 6 2 4)(3 7) to domain to reply.

"Jeff Thies" <no****@nospam.net> writes:

// m is an angle measure in degrees
define cosD(m) { return Math.cos(radians(m)); }

I like that idea but can''t get it to work. I''m getting an error:
missing ; before statement. (after the define)

This was me having a Scheme braino. Replace ''define'' by ''function''.

--
Chris Jeris cj****@oinvzer.net Apply (1 6 2 4)(3 7) to domain to reply.

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