AnswersEA Pre-Calculus Credit RecoveryApplying Trigonometric Functions

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Determine the value of (cosine of 79 degrees, and 15 minutes). In this case, minutes are 1/60 of a degree.

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A
0.186524036
B
0.268954236
C
0.4852913584
D
0.7394832568
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The hard disk of a computer spins at 256 rotations per second. How many degrees does the hard disk pass through in one second?a.c.b.d.

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A
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D
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If the measurement of a central angle is , find the length of its intercepted arc in a circle with a radius of 15 inches.

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18.4 inches
B
16.6 inches
C
20.2 inches
D
22.6 inches
4

If is in standard position, determine a coterminal angle that is between & and state the quadrant in which the terminal side lies.

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; IV
B
; IV
C
; II
D
; II
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Use the unit circle to find the value of .a.undefinedc.b.d.

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A
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B
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D
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If , find .a.c.b.d.

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B
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C
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D
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For a circle of radius 3 feet, find the arc length s subtended by a central angle of

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feet
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feet
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feet
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feet
8

When a 757 passenger jet begins its descent to the Ronald Reagan National Airport in Washington, D.C., it is 3900 feet from the ground. Its angle of descent is . What is the plane’s ground distance to the airport?

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ft
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ft
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ft
D
ft
9

Find the values of the six trigonometric functions of an angle in standard position if the point with coordinates (12, 5) lies on its terminal side.

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sin a = , cos a = , tan a = csc a = , sec a = , cot a =
B
sin a = , cos a = , tan a = csc a = , sec a = , cot a =
C
sin a = , cos a = , tan a = csc a = , sec a = , cot a =
D
sin a = , cos a = , tan a = csc a = , sec a = , cot a =
10

If

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2.0
B
2.2
C
4.0
D
4.2
11

Give the angle measure represented by 4.5 rotations counterclockwise.a.c.b.d.

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12

Convert into radians.a.c.b.d.

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13

If and find . Round to the nearest tenth. a. c. b. d. Please select the best answer from the choices provided

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C
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D
14

A hiker walks along a path and comes to a cliff. He wants to find out how high the cliff is, so he ties a 110 foot cable to a rock at the top, and tosses the rest of the cable over the cliff. When the hiker gets to the bottom, he pulls the cable to length, and measures the angle that it makes with the ground. What function will he use to determine the height of the cliff, and what is the height if the angle is ?

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tangent; 51.3 feet high
B
sine; 46.5 feet high
C
cosine; 99.7 feet high
D
tangent; 68.7 feet high
15

Find the value of the cosine for .a.c.b.d.

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A
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B
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D

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