2/9/12 Sect. 7.4 Trigonometric (Trig) Ratios Notes: SWBAT compute trigonometric ratios- sine, cosine & tangent, building blocks of science & engineering.

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2/9/12 Sect. 7.4 Trigonometric (Trig) Ratios Notes: SWBAT compute trigonometric ratios- sine, cosine & tangent, building blocks of science & engineering. Bell Ringer: pg 360 #10 HW Requests: pg , 31, 36-38, 40, ADD 27, 29; Complete TIA Reading Across the Content Bonus: #28 (15 minutes) Homework: pg 368 #19-35 odds FQ 1 Do trig ratios depend on the size of the right triangle? FQ 2 What is SOH-CAH-TOA? FQ 3 How are trig ratios used in navigation and construction? Exit Ticket: pg. 367 #6, 7, 18, 22 Announcements: Friday - Quiz

2/10/12 Sect. 7.4 Trigonometric (Trig) Ratios Notes: SWBAT compute trigonometric ratios- sine, cosine & tangent, using right angles and they will solve problems using Trig Ratios Trig Ratios - building blocks of science & engineering. Bell Ringer: Quiz (15 minutes) HW Requests – pg 368 #19-35 Homework: Worksheet 7.4 Ex: pg 368 #13-15 Exit Ticket: pg 367 #40-48 Announcements:

Right Triangle Hypotenuse = 2n Short leg, opposite  30  = n Long leg, opposite  60  = Special Right Triangles n 2n2n 30  60  n n Right Triangle

Sin, Cos and Tan In any right triangle, for any angle: sine of angle = length of the opposite side OPP length of the hypotenuse HYP cosine of angle = length of the adjacent side ADJ length of the hypotenuse HYP tangent of angle = length of the opposite side OPP length of the adjacent side ADJ Shorthand notation: sin = o/h cos = a/h tan = o/a Often remembered by: soh cah toa A P Q A A opposite P adjacent P h