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Stuck on functions question

A function is defined by f(x) = 2cos^-1 (x - 1)

i) Write down the domain and range of this function
ii) Find the exact value of f(-0.5)
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Notnek
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Original post by Mark Scicluna
A function is defined by f(x) = 2cos^-1 (x - 1)

i) Write down the domain and range of this function
ii) Find the exact value of f(-0.5)

Do you know the domain and range of cos⁡−1x\cos^-1 x?

Also, please post maths questions in the maths forum in future and you'll get a faster response. I've moved this thread for you.

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