Solve 
by completing the square, if possible.
A. 
B. 
C. 
D. 
E. no solutions
Answer: B
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Use logarithmic differentiation to find the derivative of y.y = 
A. 
B. 
C. 
D. 
+ cot x - 
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 (-?, -3) and (3, ?); concave down on (-3, 3) B. Local minimum at x = 3 ; local maximum at x = -3 ; concave up on (0, ?); concave down on (-?, 0) C. Local minimum at x = 3 ; local maximum at x = -3 ; concave down on (0, ?); concave up on (-?, 0) D. Local minimum at x = 3 ; local maximum at x = -3 ; concave down on (-?, -3) and (3, ?); concave up on (-3, 3)
Use Identities to find the exact value.cos 
cos 
+ sin 
sin 
A. 
B. 
C. 
D. - 1
Perform the indicated operations and simplify the result. Leave the answer in factored form.
A. 
B. 
C. 7
D. x2 + 7