Rewrite the trigonometric expression as an algebraic expression involving the variable u. Assume that 
and that the value of the "inner" inverse trigonometric expression represents an angle ? such that 
cos (cot-1 u)
A. 
B. 
C. 
D. 
Answer: B
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Use the properties of angle measures to find the measure of each marked angle.Lines m and n are parallel.
a = (2x + 66)°b = (4x + 8)°
A. 151°, 151° B. 124°, 124° C. 29°, 29° D. 64°, 64°
A simplex tableau is given. Compute the next tableau. x1 x2 x3 x4 M 
A. x1 x2 x3 x4 M
B. x1 x2 x3 x4 M
C. x1 x2 x3 x4 M
D. x1 x2 x3 x4 M
Use multiplication to check the answer. If an answer is incorrect, find the correct answer.
A. Correct B. Incorrect; should be 106 R33 C. Incorrect; should be 105 R32 D. Incorrect; should be 106 R31
Find the vertex, focus, and directrix of the parabola with the given equation.(x - 2)2 = -8(y - 3)
A. vertex: (3, 2) focus: (3, 0) directrix: y = 4 B. vertex: (-2, -3) focus: (-2, -5) directrix: y = -1 C. vertex: (2, 3) focus: (2, 1) directrix: y = 5 D. vertex: (2, 3) focus: (2, 5) directrix: x = 1