5.2 Right Triangle Trigonometry - staffweb.psdschools.org - / · 2009-02-20 · 5.2 Right Triangle...

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Special Right Triangles and the Unit Circle 1 February 20, 2009 Feb 1910:24 AM hypotenuse opposite adjacent 5.2 Right Triangle Trigonometry Objective: Find rectangular points on the unit circle.

Transcript of 5.2 Right Triangle Trigonometry - staffweb.psdschools.org - / · 2009-02-20 · 5.2 Right Triangle...

Page 1: 5.2 Right Triangle Trigonometry - staffweb.psdschools.org - / · 2009-02-20 · 5.2 Right Triangle Trigonometry ... Special Right Triangle Relationships 1 1 2 45 45 o o 1 2 30 3 60

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5.2 Right Triangle Trigonometry

Objective: Find rectangular points on the unit circle.

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The "BIG 3" functions are defined:

SOH CAH TOA

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There are three more functions, but they are just reciprocals of the big 3.

sine cosine tangentcosecant secant cotangent

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Fill in the degrees and radians for every multiple of 45  and 30.oo

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Page 9: 5.2 Right Triangle Trigonometry - staffweb.psdschools.org - / · 2009-02-20 · 5.2 Right Triangle Trigonometry ... Special Right Triangle Relationships 1 1 2 45 45 o o 1 2 30 3 60

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( +, + )( ­, + )

( ­, ­ )( +, ­ )

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sin    =  yr

cos    =  xr

tan    =  yx

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5.2 A worksheet

#'s: 7­14, 15­35 odds