Question

Let f(x) = cos-1x. Then the domain of f(x) is [-1,1] and the range is all real numbers.

Answer 1

This is the concept of geometry, the function given by f(x)=cos^x
can be written as cos y=x
The domain if the function is [-1,1] and the range is given by [0,π] where π=180°

Answer 2

Answer:

The answer is False

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