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Having coded a 3D engine: sin and cos are cool. Tan can fuck right off. Atan doubly so.
And radians are the devil's work.
fuck you radians are cool and atan is actually incredibly useful , so much they made atan2
tan is also ok ig
Anything that is "degrees" is the devils work. Radians are so neat and IIRC it makes a lot of trigonometry math easier. Yes, they're a bit weird to get into once one has been indoctrinated to degrees, but (pi/2) radians is just so nice.
Yeah I fuckin' love dealing with transcendental constants and fractions just to describe a right angle. A quarter-circle being one-half just makes so much sense! It's awesome seeing all these mantissa-only numbers, because you can totally tell apart sane results and srand() without doing floating-point math in your head!