2 February 1998 Vol. 3, No. 5
THE MATH FORUM INTERNET NEWS
Trig Course  Joyce  Math Teaching Ctr  Exeter  Organizations
A SHORT COURSE IN TRIGONOMETRY  David Joyce
http://aleph0.clarku.edu/~djoyce/java/trig/
What is Trigonometry? Trigonometry began as the computational
component of geometry. One statement of plane geometry says
that given one side and two angles of a triangle, the other
two sides and the remaining angle are determined. Trigonometry
includes the methods for computing those other two sides.
(The remaining angle is easy to find since the sum of the
three angles equals 180 degrees.)
Joyce organizes his course around these headings:
 Who should take this course?
 Applications of trigonometry
 What is trigonometry?
 Angle measurement
 Chords
 Sines
 Cosines
 Tangents and slope
 The trigonometry of right triangles
 The trigonometry of oblique triangles
 Summary of trigonometric identities
 Polar coordinates (yet to be written)
With a Javaenabled browser you can drag the points in
the diagrams and see the results of your readjustments.
More Internet resources for trigonometry are highlighted by
StudyWeb and the UTK Math Archives, and an extensive list
is available from the Math Forum:
http://www.studyWeb.com/math/trigonometry.htm
http://archives.math.utk.edu/topics/trigonometry.html
http://mathforum.org/~steve/steve/mathtrig.html
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THE CENTRE FOR INNOVATION IN MATHEMATICS TEACHING
UNIVERSITY OF EXETER, UNITED KINGDOM
http://www.ex.ac.uk/cimt/
The Centre offers a variety of resources for research and
curriculum development in mathematics teaching and learning
in schools and colleges:
 Resources/Worksheets
 Data Bank
 Puzzles, Pastimes and Competitions
 Games
 Computer Programs
 Recreational Mathematics
 General Guide to Other Sources of Mathematics on the Web
Worksheets currently available cover bar codes, pipelines,
posting parcels, genetic fingerprinting, postcodes, time
zones, birthdays, recurring decimals, a dipstick problem,
hill walking, and minimum wrapping. Other teaching resources
include blank grids, fact sheets suitable for handouts,
exercises and practice sheets, and teachers' notes.
The site also provides a Dictionary of Measures, Units,
and Conversions:
http://www.ex.ac.uk/cimt/dictunit/dictunit.htm
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MAJOR U.S. MATH ORGANIZATIONS ON THE WEB
A short list of sites to explore:
 Adult Numeracy Practitioners Network (ANPN)
http://www.std.com/anpn/
 American Mathematical Association of TwoYear Colleges (AMATYC)
http://www.amatyc.org/
 American Mathematical Society (AMS) (eMATH)
http://www.ams.org/
 American Statistical Association (ASA)
http://www.amstat.org/
 MAA Online: Mathematical Association of America
http://www.maa.org/
 National Association of Mathematicians (NAM)
http://dimacs.rutgers.edu/~nate/orgs/nam/
 National Council of Teachers of Mathematics (NCTM)
http://www.nctm.org/
 Society for Industrial and Applied Mathematics (SIAM)
http://www.siam.org/
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