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Another useless post about funny trig...

There were some posts here about areas, and then they made me think (yes, it's possible, sometimes Wink)
The area of a L shape squared surface is easy to calculate :



If I draw a circle centered in O, passing through (a,b)and (b,a), saying the radius = 1, then I can write :
a=cos(a) and b= sin(a)
then :

By the same way:
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  • The software only does the math you tell it to (and a bit on the background, of course.) You have to sort of train it, and yourself, these general practices.
    As far as I understand theres not a button that says "Get me the area of this part".
    That being said, there are a gajillion ways to go about doing probably anything; this is an example.
    "You can use a scientific calculator to make calculations, but do you want to draw graphs?"
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