Unit Test — Unit test Answers
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21
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Which function will have a y-intercept at –1 and an amplitude of 2?
A
f (x) = negative sine (X) minus 1
B
f (x) = negative 2 sine (x) minus 1
C
f (x) = negative cosine (x)
D
f (x) = negative 2 cosine (x) minus 1
22
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Which function describes the graph below?
A
f (x) = 6 cosine (x)
B
f (x) = 3 cosine (x) + 3
C
f (x) = 6 sine (x)
D
f (x) = 3 sine (x) + 3
23
If , which of the following represents approximate values of and , for ?
A
sine theta almost-equals 0.9511; tangent theta almost equals 0.3249
B
sine theta almost-equals 0.9511; tangent theta almost equals 3.0780
C
sine theta almost-equals 3.2362; tangent theta almost-equals 0.0955
D
sine theta almost-equals 3.2362; tangent theta almost-equals 10.4731
24
Which of the following is true of the location of an angle, , whose tangent value is ?
A
has a 30-degree reference angle and is located in Quadrant II or IV
B
has a 30-degree reference angle and is located in Quadrant II or III
C
has a 60-degree reference angle and is located in Quadrant II or IV
D
has a 60-degree reference angle and is located in Quadrant II or III
25
Which Pythagorean identity is correct?
A
sine squared (theta) + 1 = cosecant squared (theta)
B
tangent squared (theta) + 1 = secant squared (theta)
C
1 minus cotangent squared (theta) = cosecant squared (theta)
D
1 minus cosine squared (theta) = tangent squared (theta)
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