2 ms·

... and the derivative of sin(x) is ... ?

• jan_Inkepa 4y ago
  Right - there's a negotiation in terms of complexity. The coefficient baggage has to go somewhere. For me I don't want to care which units I use (and I'm rarely inspecting the exact angle as a number) - consistency is most important. I'm rarely interested in the precise numerical value of an angle - it's just a thing in the graphics/physics pipeline somewhere. I don't know if that makes me agnostic about this proposal or conservative.
  • ncmncm 4y ago
    When you store a value that will be reused, like in an array of points, if every time you walk the array multiplying by a constant, you should seek to store values in such a way that it does not need that treatment. If you are taking sin and cos each time through (presumably, added to some angle), it should be pre-multiplied for the fastest implementation of sin and cos available.
• trashtester 4y ago
  Re(exp(ix)). Using degrees, turns, etc instead of radians, is like using 10^y instead of e^x (where y=x/ln(10)). Useful for many practical things, but useless for a lot of math applications, especially involving differential equations, complex numbers etc.
• Dan42 4y ago
  > and the derivative of sin(x) is ... ? I believe it's cos(x). And I fail to see how that would change regardless of what unit x is expressed in. Sorry, my trig is veeery rusty.
  • jjgreen 4y ago
    Only when the angle is in radians ...