Determine if the following is an identity.cos2x - sin2x = 1 - 2 sin2x
A. Identity
B. Not an identity
Answer: A
Mathematics
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Write or illustrate the number in the indicated form.64; Express in expanded form.
A. 6 ? 100 + 4 ? 101 B. 6 ? 101 + 4 ? 100 C. 6 ? 101 + 4 ? 102 D. 6 ? 102 + 4 ? 101
Mathematics
Factor.x3 - x2 - 56x
A. x(x + 8)(x - 7) B. x3 - x2 - 56 C. (x2 + 1)(x - 56) D. x(x + 7)(x - 8)
Mathematics
Solve.x + y + z = 6x - z = -2 y + 3z = 11
A. (-1, 2, -3) B. (0, 4, 2) C. (3, -2, 5) D. (1, 2, 3)
Mathematics
Determine where the function is increasing and where it is decreasing.f(x) = -4x2 - 2x - 3
A. decreasing on 
increasing on 
B. increasing on 
decreasing on 
C. increasing on 
decreasing on 
D. increasing on 
decreasing on 
Mathematics