What is the range of the function $f(x)=-4cos(2x - 3)$ ?

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Answer 1 · 2015-02-10T03:51:48

The range is $[-4,4]$ .

Since $2x-3$ can be any real number, the range of $-4cos(2x-3)$ can be determined by expanding the range of $cos(x)$ by a factor of $4$ .

What is the range of the function f(x)=-4cos(2x - 3)f(x)=-4cos(2x - 3)?