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Chapter 9 Trig Applications Fr. Chris Trig Applications Fr. Chris Slide 2 Right Triangles Proof:Also... Slide 3 9.1(p. 633) Slide 4 Slide 5 What about Triangles that ARENT Right Triangles? Slide 6 Law of Sines or for that matter... If you know two angles and a side Slide 7 Proof Slide 8 ASA Case (1 solution) Slide 9 SAA/ASS Ambiguity See page 640 for details... Dont Panic... it sorts itself out... Slide 10 The Solution? Slide 11 Could Both Betas Work? Slide 12 Could neither work? But doesnt sine stay between 1 and -1????? ERR:DOMAIN Slide 13 WHAT ABOUT SAS & SSS? Law of Sines wont work! Slide 14 Law of Cosines Slide 15 Proof Slide 16 SAS page 651#9 Slide 17 SSS page 651#21