Find the domain and range of the function.f(x) = -7 cos2 x

A. Domain: (-?, ?); range: [-7, 0]
B. Domain: (-?, ?); range: (-?, 0]
C. Domain: (-?, 0]; range: (-?, ?)
D. Domain: [-7, 0]; range: (-?, ?)


Answer: A

Mathematics

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A.
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C.
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Fill in the blank(s) with the appropriate word(s).

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