Functions and its inverse

shayaant

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Joined
May 10, 2010
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i have my a level math exam tomorrow. need help urgently please.
I'm having difficulty finding ranges and domains of quadratic function and its inverse.
here's a question
The function f is defined by f : x   5 ? 3 sin 2x 0<=x<=pie (<= less than or equal to sign)
(i) Find the range of f.
(ii) Sketch the graph of y = f(x).
(iii) State, with a reason, whether f has an inverse.

now how do i figure out whether f has an inverse?
Also what is a composite function and a one to one function?
Regards
Someone in need
 
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