Solving Trigonometric Equations — Unit test Answers
25 verified answers
21
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What is expressed as a single trigonometric ratio?
A
–tan(20°)B
–tan(5°)C
tan(5°)D
tan(20°)22
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Review the proof of .tan(A – B) =Step 1: Step 2: Step 3: Step 4:
A
cos(A)cos(B)B
cos(A)sin(B)C
sin(A)cos(B)D
sin(A)sin(B)23
Given: What is the value of ?
A
StartFraction StartRoot 15 EndRoot + 1 Over 1 minus StartRoot 15 EndRoot EndFraction
B
StartFraction negative StartRoot 15 EndRoot + 1 Over 1 + StartRoot 15 EndRoot EndFraction
C
StartFraction StartRoot 15 EndRoot + 1 Over 1 + StartRoot 15 EndRoot EndFraction
D
StartFraction negative StartRoot 15 EndRoot minus 1 Over 1 minus StartRoot 15 EndRoot EndFraction
24
An object is attached to a spring that is stretched and released. The equation models the distance, d, of the object in inches above or below the rest position as a function of time, t, in seconds. Approximately when will the object be 6 inches above the rest position? Round to the nearest hundredth, if necessary.
A
0 secondsB
1.38 secondsC
4.62 secondsD
8 seconds25
What are all the exact solutions of on the interval ? Give your answer in radians.
A
and
B
mc013-5.jpg
C
mc013-6.jpg
D
and
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