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How to get angle out of sin(angle), asin doesnt work?


Kama

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trying to solve equation but cant get right result

 

is there any way to get angle if I already know sin(alpha)?

in highscool we used tables to get that, but how to do that in code?

 

@a = degrees(asin(sin(20)));

shouldnt I get 20 degrees back?

why @a = 65,91 ?

 

Thanks

 

 

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