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lidiya [134]
3 years ago
15

if the value to the nearest thousandth, of cosO is -0.385, which of the following could be true about O? A. 0<O<pi/6 B. pi

/6<O<pi/3 C. pi/3<O<pi/2 D. pi/2<O<2pi/3 E. 2pi/3<O<pi
Mathematics
1 answer:
Dimas [21]3 years ago
4 0
Its the last choice there. Converting that to degrees you get the interval of 90<O<120, which is the only angle that lies in the quadrant in which cosine is negative, which is the second quadrant. Cosine is also negative in the third quadrant, but you don't have choices for the third quadrant.
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If f(x) = 3x² tlo, what is f(-7)?
tia_tia [17]

Answer:

Step-by-step explanation:

Be careful how you handle this.

f(-7) = 3(-7)^2

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f(-7) = 147

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3 years ago
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m_a_m_a [10]

Answer:

(a + 3)

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3 years ago
A 16-ounce bag of cereal costs about $2.88. What is the unit rade of the cereal?
VLD [36.1K]

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