Trigonometry High School Examination Worksheet Template Page 5

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12 If the amount of time students work in any given week is normally
computations.
distributed with a mean of 10 hours per week and a standard
deviation of 2 hours, what is the probability a student works between
8 and 11 hours per week?
(1) 34.1%
(3) 53.2%
(2) 38.2%
(4) 68.2%
1 __
3 __
13 What is the conjugate of
i?
2
2
1 __
3 __
3 __
1 __
(1)
i
(3)
i
2
2
2
2
1 __
3 __
1 __
3 __
(2)
i
(4)
i
2
2
2
2
12 __
14 Given angle A in Quadrant I with sin A
and angle B in
13
3 __
Quadrant II with cos B
, what is the value of cos (A
B)?
5
33 __
63 __
(1)
(3)
65
65
33 __
63 __
(2)
(4)
65
65
15 Which expression represents the third term in the expansion of
4
3
(2x
y)
?
3
4
2
(1)
y
(3) 6x
y
4
2
4
2
(2)
6x
y
(4) 2x
y
[5]
[OVER]
Algebra 2/Trigonometry – January ’12

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