Verify the identity.cos 4x = 2 cos2 2x - 1
What will be an ideal response?
cos 4x = cos [2(2x)] = 2 cos2 2x - 1
Mathematics
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Evaluate the logarithm.log2
A. -1 B. 2 C. 1 D. 0
Mathematics
Find the domain. Write interval notation for the answer.f(x) = 
A. (-?, -8) ? (-8, 0) ? (0, ?) B. (-?, -8) ? (0, ?) C. (-?, -8) ? (-8, 4) ? (4, ?) D. (-?, 0) ? (8, ?)
Mathematics
Solve the equation. Round decimal answers to the nearest thousandth.6e2x - 1 = 36
A. 1.396 B. 18.500 C. 0.799 D. 0.396
Mathematics
Solve the problem involving direct or inverse variation.If x varies inversely as v, and x = 36 when v = 9, find x when v = 81.
A. x = 81 B. x = 36 C. x = 9 D. x = 4
Mathematics