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Coolmath Precalculus Review Calculus Preview
Lesson 28 - Trigonometry - The Unit Circle and Basic Trig Identities (page 5 of 6)
---- This Precalculus review (Calculus preview) lesson reviews the Unit Circle and basic trigonometric (trig) identities and gives great tips on how to remember everything.

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other Coolmath Books: Coolmath Algebra Part 1, Part 2 and Part 3
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Graphing Calculator Scientific Calculator << a new window will open for these
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Let's do some!

sin( pi / 6 ) up and down guy , short , positive
up and down guy

short
positive

 1 / 2
cos( 7 * pi / 6 ) back and forth guy , long, negative
back and forth guy

long
negative

 - square root( 3 ) / 2
sin( - pi / 4 ) up and down guy , medium , negative up and down guy

medium
negative

 - square root ( 2 ) / 2

 

YOUR TURN:

cos( 5 * pi / 4 )

 

sin( 2 * pi / 3 )

Continued on the next page

 The printing and distribution and/or downloading of these lessons is strictly prohibited.
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Graphing Calculator Scientific Calculator << a new window will open for these
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