*Arc is inexplicably lacking trig, exp, and log* Okay, I haven't used Arc in a w... | Hacker News

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		mnemonicsloth on May 15, 2008 \| parent \| context \| favorite \| on: Why Arc is bad for exploratory programming Arc is inexplicably lacking trig, exp, and log Okay, I haven't used Arc in a while -- existing Scheme codebase -- but Arc is built on PLT, which is compliant with R5RS, which does include basic math functions: http://www-sop.inria.fr/mimosa/fp/Bigloo/doc/r5rs-9.html (search for sin, cos, etc). Did Arc forget how to talk to the numerics library? Rebind "cos" "sin" and "exp"? Is this guy just being stupid? 'splain me please.

sacado on May 15, 2008 [–]

In ac.scm, add :

  (xdef 'cos 'cos)
  (xdef 'sin 'sin)
  (xdef 'exp 'exp)

And you're done.

rkts on May 15, 2008 | [–]

I think that should be

  (xdef 'cos cos)

etc.

sacado on May 15, 2008 | | [–]

yep, you're right. sorry.

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