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Choose the correct equation for the graph.
60 50 40 30 20 10 10 20 A. 2π y = 30 + 25cos
x 20 B. 2π y = 30 + 25sin
x 20 C. 2π y = 55 + 30cos
( x − 4) 20 D. y = 55 + 30sin 2π x 20 22. Prove the identity cos x + sin x tan x = sec x . 23. What is the simplified form of sin( x − 2 π ) ?
A. sin x
B. cos x C. cos x D. sin x 24. Given 5 = 3 cos( πx ) + 2.8 , find all solutions in radians.. Page 9 25. Island A is 160 miles from Island B. A ship sails 310 miles from Island A and then
finds that he is off course and 210 miles from Island B. What angle, in degrees, must he
turn through to head straight for island B? A B 26. Given a triangle with a =4, A = 17º and B = 28º, what is c?
A. 9.7
B. 6.4
C. 0.6 D. 2.5 27. The SAT exam is designed to produce a mean score of 500 and a standard deviation
of 100 points. Approximately what percentage of students score above 600? 28. A bag contains 5 red marbles and 10 blue ones. If three marbles are drawn without
replacement what is the chance that one is red and two are blue?...
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 Fall '10
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