Use the given information given to find the exact value of the trigonometric function.sec ? = 4,
? lies in quadrant I
Find cos 
.
A. 
B. 
C. 
D. 
Answer: A
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Use your calculator to solve the problem.When a ball with coefficient of restitution e is dropped from a height h meters onto a large flat surface, the time t from the first impact until the ball stops bouncing is given by t = 
seconds. Find the time it takes a ball with coefficient of restitution 0.28 to stop bouncing if it is dropped from a height of 79.3 centimeters. (Round to the nearest tenth.)
A. 22.4 seconds B. 2.1 seconds C. 20.7 seconds D. 2.2 seconds
Write the equation in polar form.x2 + y2 = -2x
A. r = -
cos ?
B. r = -
sin ?
C. r = -2 sin ?
D. r = -2 cos ?
Solve the problem.Two surveyors 180 meters apart on the same side of a river measure their respective angles to a point between them on the other side of the river and obtain 54° and 68°. How far from the point (line-of-sight distance) is each surveyor? Round your answer to the nearest 0.1 meter.
Fill in the blank(s) with the appropriate word(s).
Solve the formula for the specified variable.a + b = s + r for r
A. r = a + b - s
B. r = s(a + b)
C. r = 
D. r = 
+ b