Thread: Cosine inverse

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    Thumbs up Cosine inverse


    How to find cosine inverse in C programming
    How to find which triangle is obtuse , acute or right angled. So by cosine rule if a,b,c are sides of triangle and A,B,C are angles of triangle then
    cosA = (b^2+c^2-a^2)/2bc . Hence A = cos-1(b^2+c^2-a^2)/2bc.
    hence how to find cosine inverse in C programming ?
    Last edited by matrixinfologic; May 28th, 2013 at 11:10 PM. Reason: mistake
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