Give the value of the indicated trigonometric function of a vector with the indicated end point.(0, -2); Find cos ?.
A. 1
B. -2
C. 2
D. 0
Answer: D
Mathematics
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Evaluate the expression.-8[-1 + 2(-9 + 3)]
A. -4 B. 48 C. 44 D. 104
Mathematics
Use the substitution method to solve the system. 5x + y = 0-5x + y = -10
A. (1, -5) B. (-1, -5) C. (-1, 5) D. (1, 10)
Mathematics
Solve by the most appropriate method.(2x - 1)2 = 121
A. 10, -12 B. 5, -6 C. 12, -10 D. 6, -5
Mathematics
Find the angle, in degrees, between two adjacent sides of the pyramid shown below. Round to the nearest tenth of a degree. [Note: The base of the pyramid is not considered a side.]
P(8, 0, 0), Q(8, 8, 0), R(0, 8, 0), S(4, 4, 4)
A. 54.7° B. 30° C. 2.1° D. 90° E. 45°
Mathematics