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# Rev3 - 2 Be able to use the Law of Cosines to solve...

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Review Test 3 Trig Inverse Trig Functions 1. Be able to write the definitions including the restrictions for sin -1 , cos -1 , and tan -1 . 2. Be able to show sin -1 (x) means on the graph of y = sin(x). (also for cos -1 and tan -1 ) 3. Be able to show the meaning of sin -1 (also for cos -1 and tan -1 ) as an angle in a triangle. 3. Be able to use inverse trig functions to solve trig equations. (See handout) 4. Be able to solve equations that reduce to the form sin(Bx + C) = ±1 or 0 and cos(Bx + C) = ±1 or 0 without the inverse functions (no calculator) (see handout) Problems : Trig Equation solving handout: problems 6,7,9,14,17,19,20,22,26,29,33,34,35 Chapter 6 Solving Triangles 1. Be able to use the Law of Sines to solve triangles.
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Unformatted text preview: 2. Be able to use the Law of Cosines to solve triangles. Problems Chapter 6 page 364-365 60; page 376 51 ; page 428 46, 50 ; Additional Problems : 1. No Calculator: From the graphs of y = sin(x) and y = cos(x) find the value of each of the following. A) sin( π /2) B) sin-1 ( -1) C) sin( π ) D) sin-1 (1) E) cos(0) F) cos-1 (0) G) cos( π /2) I) cos-1 (-1) 2. A triangle has sides of lengths 7,8,and 12. Find the size of the angle opposite to the side of length 12. Give the answer to the nearest degree. 3. No Calculator: Use an appropriate triangle to find the value of cos(tan ! 1 5 3 " # \$ % & ' ) 4. Draw a right triangle with cos ! 1 x 5 " # \$ % & ' as an angle. Give the sides in terms of 5 and x....
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