Find the limit or state that it does not exist.
cos 
A. ?
B. 1
C. 0
D. Does not exist
Answer: D
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Graph.7x2 + 2y2 = 14
A. 
B. 
C. 
D. 
Find the area of the specified region.Inside the circle r = 
sin ? and outside the cardioid r = 1 + cos ?
A. 
B. 
C. 
D. 
Write the expression in the standard form a + bi.(6 + 5i)(6 - 5i)
A. 36 - 25i B. 61 C. 36 - 25i2 D. 11
Use the graph of the function f(x) to locate the local extrema and identify the intervals where the function is concave up and concave down.
A. Local minimum at x = 3; local maximum at x = -3 ; concave up on (0, -3) and (3, ?); concave down on (-3, 3) B. Local maximum at x = 3; local minimum at x = -3 ; concave up on (0, -3) and (3, ?); concave down on (-3, 3) C. Local minimum at x = 3; local maximum at x = -3 ; concave up on (0, ?); concave down on (-?, 0) D. Local minimum at x = 3; local maximum at x = -3 ; concave down on (0, ?); concave up on (-?, 0)