Decide whether or not the given equation is an identity.cos x + cos x tan2 x = sec x
A. Yes
B. No
Answer: A
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Use a calculator to evaluate the function at the indicated values. Round your answers to three decimals.
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Solve the problem.If three cards are successively dealt from a 52-card deck without replacement, in how many ways could they be a face card, then a spade, and then a heart?
A. 1862 B. 1950 C. 936 D. 1248
Use the given zero to find the remaining zeros of the function.f(x) = x5 - 10x4 + 42x3 -124 x2 + 297x - 306 ; zero: 3i
A. -2, -3i, 4 - i, 4 + i B. 2, -3i, 4 - i, 4 + i C. -2, -3i, -4 - i, -4 + i D. 2, -3i, -4 - i, -4 + i
Find the coordinates of the vertex and x-intercepts for the quadratic function.f(x) = -5x2 - 2x - 3
A. vertex 
no x-intercept
B. vertex 
x-intercept (-3, 0)
C. vertex 
x-intercept (3, 0)
D. vertex 
no x-intercept