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X y Find the exact trig values for an angle of This angle has a terminal side in the 2 nd quadrant (because 5/4 = 1.2)

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Presentation on theme: "X y Find the exact trig values for an angle of This angle has a terminal side in the 2 nd quadrant (because 5/4 = 1.2)"— Presentation transcript:

1 x y Find the exact trig values for an angle of This angle has a terminal side in the 2 nd quadrant (because 5/4 = 1.2)

2 Finding Trig Values from an x-y coordinate x y Find the 6 trig functions for an angle which has terminal side passing through (-5, -3)

3 x y Find the for all angles that are between 0 and 360 degrees (also in include the radian measurements From the chart we get that 60 degrees has a sin is negative in the 3 rd and 4 th quadrants

4 Law of Cosines – Solve the Triangle A C B Solve the triangle 15

5 Law of Cosines – Solve the Triangle A C B Solve the triangle 15

6 Law of Cosines – Solve the Triangle A C B=21º Solve the triangle 15

7 Law of Cosines – Solve the Triangle A C=33º B=21º Solve the triangle 15

8 Law of Cosines – Solving a Triangle C A B 75º Find missing side of the triangle, and then use the law of sines to find the missing angles 41.63

9 Law of Cosines – Solving a Triangle C A B 75º Find missing side of the triangle, and then use the law of sines to find the missing angles We can now use law of sines to find one of the angles that is missing

10 Law of Cosines – Solving a Triangle C A B 75º

11 Law of Cosines – Solving a Triangle C A B 75º Now use this angle and the 75 that you were given in the beginning to find the 3 rd angle

12 727 #1-3 (sketch the angles and reference angles – then find the answers) 727 #4-6 (find all angles between 0 and 360 and their radian counterparts) 724 #75, 79 (find all missing angles and show ALL work along with a drawing) 724 #81 (find all missing sides and angles – DO NOT FIND AREA) 697 #9, 11, 13, 15 (make sure they have the proper signs and show ALL work) 697 #22, 23, 25, 27 (sketch and find the reference angle) 697 #36, 38, 40 (you need a sketch and to explain how you know without using the calculator)


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