7.3 Special Angles (30  & 60  ). Equilateral Triangle 60  angles w/ sides = 1 Drop Perpendicular Bisector to form 30-60-90  1 60  1 1 30  60  30.

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Presentation transcript:

7.3 Special Angles (30  & 60  )

Equilateral Triangle 60  angles w/ sides = 1 Drop Perpendicular Bisector to form  1 60   60  30 

Trig Values for 30  SOH – CAH – TOA Memorize!! 60  30  Opp Adj Hyp reciprocals = 2

Trig Values for 60  SOH – CAH – TOA Memorize!! 60  30  Opp Adj Hyp reciprocals = 2

Related (Reference) Angles Reference  for 120  is 60  Have SAME trig values, except possibly sign Sign depends on Quadrant the  is in x y Positive acute  that terminal side makes w/ x-axis 120  60 

Find the exact values of the trig functions of 120  x y 120  Reference  for 120  is 60  Trig Values same as 60  except signs 120  is in QII, x is (–), y is (+) 60 

Homework #706 Pg , 61 – 63, 66 & Do angles & Memorize 30  & 60  Trig Values