Problem: I want a function to compute the angles in a right triangle only knowing the length of all three sides (i don't know the angles).

I tried to solve this with the Math::Cephes module, But the function tells me I have to pass an array reference to it. I've tried to pass it my X,Y points in several ways but no dice.

Anybody know a simple way to do this? Here's the code from my last attempt with Cephes. Code does NOT work. The module loads fine. My error is: "Must supply array references at C:/Perl/site/lib/Math/Cephes.pm line 107." 

use Math::Cephes qw(:all);
# double p[3], q[3], vecang();$y = vecang( $p, $q );
# For two vectors p, q, the angle A between them is given by
my @p = ("0","0");
my @q = ("4","3");
my $ang = vecang(@p,@q);
print "ang=$ang\n";

[download]
thanks for readin,
jtrue

In reply to Compute Angles of a Right Triangle by true

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.