Transcript Jessica Walkerx

I love trig
History of Trigonometry
By Jessica Walker
What’s my topic?
Trigonometry
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44
30 cm
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36
S
Q
T
Why am I interested?
• This is basically the only branch in math I am
half decent at, and plus I do like it! It’s
generally just a fun time 
What is trigonometry?
• A branch of mathematics that studies triangles and
the relationships between their side lengths and
angles between those sides
3 cm
7 cm
For example here is a picture of
a triangle with two labeled sides
and one angle. Even with this
little information all sides and all
angles can be found. This is
because of the triangles’
relationship between the sides
and angles. This can be solved
through sine law
Why is it important?
Trigonometry is important for many reasons!
1. To get an education (you might not need to use trigonometry in your
everyday life, but you will need to learn it to pass math on a 20 level or
you can’t graduate :P)
2. To teach (you might have kids one day, they might need help, you
never know :P)
3. Trigonometry is everywhere!!! *see next slide*
4. To understand the basics of something and where is came from
(having knowledge makes you wiser then you already are)
5. It’s, uhhh, fun! 
Trigonometry to build and create!
To see and to understand!
In nature,
and in things
you enjoy and
love
History: where did it originate?
• Believe it or not trigonometry dates all the way
back to the early ages of Egypt and Babylon
• Angles were measured in degrees and Greek
Astronomer Hipparchus complied a trigonometry
table that measured the length of the chord
subtending the various angles of a circle with a
fixed radius “r”
• Hipparchus was known as the father of
trigonometry and considered the founder of the
science of trigonometry
History continued:
Where does the term trigonometry come from?
Taken from the Greek words “trigonon” meaning
triangle and “metria” meaning measure. The
word literally means triangle measurement!
History con: regarding trigonometric functions
• Aryabhata (476 CE - 550 CE)
discovered sine and cosine
• Muhammad (780 CE - 850 CE)
discovered the tangent
• Albert Girard (1595-1632), was the
first to use the abbreviations sin,
cos, and tan.
Why is it important, again?
How is it nawt
Just kidding! I truly think it is important to just learn! Life is learning and having knowledge is
great! 
What did I learn?
•
•
•
•
When trigonometry was introduced
Where trigonometry came from
What “trigonometry” actually means
Who were the founders and what did
they discover
• Who was the first man to use sOh cAh
tOa
Resources
1. http://www.trigonometry-help.net/history-oftrigonometry.php
2. http://en.wikipedia.org/wiki/Trigonometry
3. https://sites.google.com/site/mymathclassroom/tr
igonometry/a-short-history-notes-abouttrigonometry
Citations
1. . N.p.. Web. 7 Jun 2013.
<http://www.trigonometry-help.net/history-oftrigonometry.php>.
2. . N.p.. Web. 7 Jun 2013.
<http://en.wikipedia.org/wiki/Trigonometry>.
3. "A Short History About Trigonometry." . N.p., n.d.
Web. 7 Jun 2013.
<https://sites.google.com/site/mymathclassroom/
trigonometry/a-short-history-notes-abouttrigonometry>.