1. Circular Functions
Trigonometry

2. by James Nickel Copyright  2006 www.biblicalchristianworldview.net

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The Unit Circle
r = 1 r
sin  = s/r = s s
cos  = c/r = c  c
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 = 30
sin  = 0.5 s
cos  = 0.866  c
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 = 45 s
sin  = 0.707
cos  = 0.707  c
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 = 60 s
sin  = 0.866
cos  = 0.5  c
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 = 90 s
sin  = 1 
cos  = 0 c
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 = 120 s 
sin  = 0.866
cos  = -0.5 c
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 = 135 s 
sin  = 0.707
cos  = c
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 = 150 
sin  = 0.5 s
cos  = c
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 = 180 
sin  = 0
cos  = -1 s c
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 = 210 
sin  = -0.5
cos  = c s
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 = 225 
sin  =
cos  = c s
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 = 240 
sin  =
cos  = -0.5 c s
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 = 270
sin  = -1 
cos  = 0 s c
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 = 300
sin  = 
cos  = 0.5 c s
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 = 315
sin  = 
cos  = 0.707 c s
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 = 330
sin  = -0.5
cos  = 0.866  c s
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 = 360 = 0
One Revolution
sin  = 0
cos  = 1 c s 
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 = 390 = 30
sin  = 0.5 s
cos  = 0.866  c
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 = 405 = 45 s
sin  = 0.707
cos  = 0.707  c
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 = 420 = 60 s
sin  = 0.866
cos  = 0.5  c
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 = 450 = 90 s
sin  = 1 
cos  = 0 c
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 = 480 = 120 s 
sin  = 0.866
cos  = -0.5 c
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 = 495 = 135 s 
sin  = 0.707
cos  = c
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 = 510 = 150 
sin  = 0.5 s
cos  = c
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 = 540 = 180 
sin  = 0
cos  = -1 s c
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 = 570 = 210 
sin  = -0.5
cos  = c s
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 = 585 = 225 
sin  =
cos  = c s
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 = 600 = 240 
sin  =
cos  = -0.5 c s
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 = 630 = 270
sin  = -1 
cos  = 0 s c
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 = 660 = 300
sin  = 
cos  = 0.5 c s
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 = 675 = 315
sin  = 
cos  = 0.707 c s
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 = 690 = 330
sin  = -0.5
cos  = 0.866  c s
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 = 720 = 360 = 0
Two Revolutions
sin  = 0
cos  = 1 c s 
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