The graph below is one complete cycle of the graph of an equation containing a trigonometric function. Find an equation to match the graph. If you are using a graphing calculator, graph your equation to verify that it is correct.
?
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: D
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Solve the problem.A pilot wants to fly on a bearing of 62.5°. By flying due east, he finds that a 51-mph wind, blowing from the south, puts him on course. Find the ground speed of the plane.
A. 57 mph B. 221 mph C. 166 mph D. 110 mph
Simplify the expression.
A. 
B. 
C. a - 2b + 1
D. a - b
Simplify.5(x + 4y + 7)
A. 5x - 20y - 35 B. 5x + 20y + 7 C. 5x + 20y + 35 D. 5x + 4y + 7
Use the maximum/minimum finder on a graphing calculator to determine the approximate location of all local extrema.f(x) = 0.1x3 -15x2 + 19x - 29
A. Approximate local minimum at 0.637; approximate local maximum at 99.363 B. Approximate local maximum at -99.363; approximate local minimum at -0.637 C. Approximate local maximum at 0.637; approximate local minimum at 99.363 D. Approximate local minimum at -99.363; approximate local maximum at -0.637