<![CDATA[Degrees or radians]]>
https://help.geogebra.org/topic/degrees-or-radians
Wed, 22 Jan 2020 09:07:42 +0000Tue, 21 Jan 2020 09:27:24 +0000Zend_Feed<![CDATA[Bonjour , Une chance que qu'on n'ait pas cette anomalie en version 5 car elle risquerait de ne jamais être corrigée . Espérons qu'elle soit rapidement corrigée en version 6 . Cordialement]]>
https://help.geogebra.org/topic/degrees-or-radians#comment-274070
Tue, 21 Jan 2020 11:01:42 +0000<![CDATA[I understand But it is a very good pedagogic experimentation... It contributes to the development of critical thinking and favours open mindedness First, students have to see that there is a problem with GeoGebra, and understand that : when it is a number (for example 30), it is degrees, and when it is a fraction of π, it is radians and after that, they will never make the mistake in a mathematical exam (always write ° when degrees)]]>
https://help.geogebra.org/topic/degrees-or-radians#comment-274106
Tue, 21 Jan 2020 19:08:41 +0000<![CDATA[What!? Are you serious!? Radians need absolutely NOT be fractions of pi!]]>
https://help.geogebra.org/topic/degrees-or-radians#comment-274112
Tue, 21 Jan 2020 21:24:24 +0000<![CDATA[Merci. I don't read french, but I had your comment translated by someone who does.]]>
https://help.geogebra.org/topic/degrees-or-radians#comment-274118
Tue, 21 Jan 2020 23:54:35 +0000<![CDATA[You need to select the main unit for angles, first. Once you decided it, GeoGebra will use it as default. If you set angles in radians, you can obtain also the trig values of angles in degrees simply by using the degrees symbol as you would do on paper. To set your default angle unit: Select the menu icon on top right, then Settings. In the opening panel, on the right, select the last icon from top (the one with a cubic function on it). It's for the Algebra View preferences. Choose your favourite angle unit from the displayed drop down list. Close the panel and try entering a calculation containing angles in Algebra View. GeoGebra will use the selected unit (unless you enter the degrees symbol °)]]>
https://help.geogebra.org/topic/degrees-or-radians#comment-274124
Wed, 22 Jan 2020 07:25:29 +0000<![CDATA[@Matteskolan : Simona answered : if you want sin(3radians) use radians in preferences (i didn't say that it is prohibited calculate sin(3radians) : but in all mathematical exercices, they never have to calculate sin(3radians). Angles are in degrees or in radians with fractions of π) ___________________________ Students with calculators CASIO or TI, always have to switch in preferences of calculator between degrees and radians, and they often make mistake when they ask for sin(30) (for sin(30degrees)) and the calculator is in radians, or if they ask for sin(π/6) (for sin(π/6radians) and the calculator is in degrees With GeoGebra, sin(30) is sin(30degrees) and sin(π/6) is sin(π/6radians) : they first have to see it (reason why i told you it develop critical thinking...) after understanding this, it is very useful (for example verify if 30° is π/6) You said it is a mathematical error. It is only a purpose of notation (as mathematicians often do isn't it..?) very useful]]>
https://help.geogebra.org/topic/degrees-or-radians#comment-274132
Wed, 22 Jan 2020 09:28:23 +0000