Use the given function value and the Fundamental identities, to find the indicated trigonometric function value. cos ? = 
Find sec ?.
A. 
B. 
C. 
D. 
Answer: D
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Find the slope of the line through the pair of points.(7, -6) and (7, -1)
A. -5 B. 5 C. 0 D. Undefined
Write the expression in the standard form a + bi.i8
A. -i B. i C. -1 D. 1
Find the points of inflection.f(x) = x4 - 24x2
A. (-2
, 144), (2
, 144)
B. (-2, -80), (2, -80)
C. (0, 0)
D. (0, 0), (-2, -80), (2, -80)
Answer the question.If we are looking for the critical points (a,b) on the surface of 
then we study the tangent lines to (a,b) along the slices parallel to the 
and 
These tangent lines must have which of the following properties?(i) They must be perpendicular.(ii) They must be horizontal.(iii) They must be horizontal, but not perpendicular.(iv) They must be perpendicular, but not horizontal.
A. Only (iii) is correct. B. Only (iv) is correct. C. Both (i) and (ii) are correct. D. Only (ii) is correct.