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Sin A = Cos A = Tan A =

Trigonometric Ratios. The word trigonometry comes from 2 Greek words, trigon, meaning triangle, and metron, meaning measure. The study of trigonometry involves triangle measurement. We will be studying basic ___________________ ______________________ ___________________________.

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Sin A = Cos A = Tan A =

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  1. Trigonometric Ratios The word trigonometry comes from 2 Greek words, trigon, meaning triangle, and metron, meaning measure. The study of trigonometry involves triangle measurement. We will be studying basic ___________________ ______________________ ___________________________ Identifying Sides (video 0:00-1:00) Hypotenuse side ___________ Opposite of angle A _________ Opposite of angle B________ Adjacent to Angle A _________ Adjacent to Angle B _______ a b B c A The trig ratios we will be studying are ________________, __________________, and ______________________ Watch this video and try to pick up on the ratios for each function: (video 1:00-1:55) Sin =______________________ Cos = _______________________ Tan = _______________________ Setting up Ratios Sin A = Cos A = Tan A = Sin B = Cos B = Tan B = A 5 3 B C 4 X Sin Z = Cos Z = Tan Z = Sin X = Cos X = Tan X = 13 5 Z Y 12 Using a Calculator Sin 39 = Cos 58 = Tan 85 = Sin 30 =

  2. Solving for a side (video 2:00-2:31) Y 10 12 85 38 X 45 70 Z A 50 34 Solving for an Angle (video 2:31-2:48) 15 W 20 7 27 X 32 12 Z Y 18 21

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