Solve the problem.Is the function f(?) = sin ? + cos ? even, odd, or neither?
Fill in the blank(s) with the appropriate word(s).
neither
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Find the slope of the polar curve at the indicated point.r = 
, ? = 2?
A. 2? B. -2? C. 0 D. Undefined
Identify the equation as either an identity or not.cos2x - sin2x = 1 - 2 sin2x
A. Not an identity B. Identity
Use the graph of a quadratic function to find the solution set of the equation or inequality.-x2 + 2x - 1 < 0
A. (-?, 1) ? (1, ?) B. ? C. x = 1 D. (-?, ?)
Find the vertex, the y-intercept, and the x-intercepts (if any exist), and graph the function.y = -x2 + 2x + 8
A. vertex (1, - 9);
x-int: (-2, 0) and (4, 0);
y-int: (0, 8)
B. vertex (1, 9);
x-int: (-2,0) and (4, 0);
y-int: (0, 8)
C. vertex (1, 9);
x-int: (-4, 0) and (2, 0);
y-int: (0, 8)
D. vertex (- 1, 9);
x-int: (-4, 0) and (2, 0);
y-int: (0, 8)