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  1. A Short Course in Trigonometry - David Joyce; Dept. of Mathematics & Computer Science, Clark University
    An introduction and a guide to trigonometry, with hints and answers to exercises, and Java applets as illustrations. Contents include applications of trigonometry, angle measurement, chords, sines, cosines, tangents and slope, the trigonometry of right triangles, the trigonometric functions and their inverses, oblique triangles, and a summary of trigonometric identities. more>>

  2. The Trigonometric Functions - MacTutor Math History Archives
    Linked essay sketching trigonometry from its beginnings out of the early correspondence between astronomy and mathematics through the 18th century, with 17 references (books/articles). more>>

  3. Trigonometry and Calculus Problem of the Week - Math Forum
    Trigonometry and calculus problems from a variety of sources, including textbooks, math contests, NCTM books, puzzle books, and real-life situations, designed to reflect different levels of difficulty. From 1998 until 2002, the goal was to challenge students with non-routine problems and encourage them to put their solutions into words. Different types of problems were used to reach a diverse group of calculus students. more>>

  4. Trigonometry Formulas - Math Forum; Ask Dr. Math FAQ
    Formulas for trig functions, bounds, identities, solving right and oblique triangles and inverse trig functions. more>>

  5. Trigonometry (S.O.S. Mathematics) - Dept. of Mathematical Sciences, Univ. of Texas at El Paso
    An online course: learning units presented in worksheet format review the most important results, techniques and formulas in college and pre-college trigonometry. Trigonometry: Angle Measures, Trigonometric Functions (magic identity, Addition Formulas, Double-Angle and Half-Angle Formulas, Product and Sum Formulas), Trigonometric Equations, Table of Trigonometric Identities. Hyperbolic Trigonometry: Hyperbolic Functions, Inverse Hyperbolic Functions. more>>


Mason error

error in file:   /usr/lib/perl5/5.6.0/Carp/Heavy.pm
line 79:  Bizarre copy of HASH in aassign
75:  # them according to the format variables defined earlier in
76:  # this file and join them onto the $sub sub-routine string
77:  if ($hargs) {
78:  # we may trash some of the args so we take a copy
79:  @a = @DB::args; # must get local copy of args
80:  # don't print any more than $MaxArgNums
81:  if ($MaxArgNums and @a > $MaxArgNums) {
82:  # cap the length of $#a and set the last element to '...'
83:  $#a = $MaxArgNums;
component stack:   /library/branch.html
code stack:   /usr/lib/perl5/5.6.0/Carp/Heavy.pm:79

debug info:   Debug file is '/var/lib/mason/debug/anon/3'.


raw error:

error while executing /library/branch.html:
Bizarre copy of HASH in aassign at /usr/lib/perl5/5.6.0/Carp/Heavy.pm line 79.