+330
http://en.wikipedia.org/wiki/Radian
...
The radian is represented by the symbol rad (Unicode-encoded as U+33AD ㎭ ). An alternative symbol is the superscript letter c, for "circular measure"—but this is infrequently used as it can be easily mistaken for a degree symbol (°). So for example, a value of 1.2 radians could be written as 1.2 rad, 1.2rad, or 1.2c.
...
Quote Alan: I'm much more used to assuming that radians are meant unless the degree symbol is used. ...
Engineers are used to Radians.
Side note: Most calculators are 10 times more precise (including this site) when trig functions are preformed in degrees instead of radians. If you need high precision, converting as needed is an optimal decision.
~~D~~
+128475 what is sin7? and how do you do it
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We have to be careful, here. Without the "degree" symbol, this means .....finding the sine of an angle with a measure of 7 rads !!! This (in degrees) is about
$${\frac{{\mathtt{7}}{\mathtt{\,\times\,}}\left({\mathtt{180}}\right)}{{\mathtt{\pi}}}} = {\mathtt{401.070\: \!456\: \!591\: \!576\: \!246\: \!1}}$$
Thus, sin(7) = 0.656986598719
But, sin(7°) = 0.121869343405
See the difference....???
+118609 That is what Alan said too but I always use a little supertext c to represent radians.
+33616 ... I always use a little supertext c to represent radians.
Interesting! I've never seen that done anywhere; is it standard in Australian schools? I'm much more used to assuming that radians are meant unless the degree symbol is used, or you know you are in degree mode (with a calculator, say)
+118609 I don't know how standard it is - It is what I was taught and so it is what I teach.
(I was lucky, I had a couple of really good maths teachers when I was at school, most of what they taught me was correct. Now I pass that learning on. It may not all be flawless)
+330
http://en.wikipedia.org/wiki/Radian
...
The radian is represented by the symbol rad (Unicode-encoded as U+33AD ㎭ ). An alternative symbol is the superscript letter c, for "circular measure"—but this is infrequently used as it can be easily mistaken for a degree symbol (°). So for example, a value of 1.2 radians could be written as 1.2 rad, 1.2rad, or 1.2c.
...
Quote Alan: I'm much more used to assuming that radians are meant unless the degree symbol is used. ...
Engineers are used to Radians.
Side note: Most calculators are 10 times more precise (including this site) when trig functions are preformed in degrees instead of radians. If you need high precision, converting as needed is an optimal decision.
~~D~~
