For the given equation, state whether the directrix is vertical or horizontal and give its location in relation to the pole.r = 
A. Horizontal, 
units below the pole
B. Vertical, 9 units to the left of the pole
C. Horizontal, 9 units below the pole
D. Vertical, 
units to the left of the pole
Answer: C
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Suppose the point (2, 4) is on the graph of y = f(x). Find a point on the graph of the given function.The reflection of the graph of y = f(x) across the y-axis
A. (-2, -4) B. (-2, 4) C. (2, 4) D. (2, -4)
Use the fundamental identities to find the value of the trigonometric function.Find cot ?, given that cos ? = 
and ? is in quadrant IV.
A. 
B. - 
C. - 
D. - 
Write a chain rule formula for the following derivative.
for w = f(x, y, z); x = g(r, s), y = h(t), z = k(r, s, t)
A. 
= 
+ 
B. 
= 
+ 
C. 
= 
+ 
D. 
= 
Simplify the expression. Assume that all variables are positive when they appear.
A. 256 B. -4 C. 4 D. not a real number