Author Topic: Functions Question  (Read 1032 times)

Offline Dania

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Functions Question
« on: October 06, 2010, 09:55:24 pm »
A function is defined by  g:x = 3-2sinx, for 0° < x < A°, where A is a constant.

Q. (i) State the largest value of A of which g has an inverse.
    (ii) When A has this value, obtain an expression, in terms of x, for g-1(x)
:)

Freaked12

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Re: Functions Question
« Reply #1 on: October 06, 2010, 10:15:31 pm »

Offline Dania

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Re: Functions Question
« Reply #2 on: October 06, 2010, 10:21:29 pm »
Grr. Still don't get it. By the way, this is a different paper. Same concept, I know. But it's just stated in that link you gave me, I want someone to explain to me how to get it.
:)

Freaked12

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Re: Functions Question
« Reply #3 on: October 06, 2010, 10:31:45 pm »
Which subject do you want help in

Its not Pure mathematics?

Offline Dania

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Re: Functions Question
« Reply #4 on: October 06, 2010, 10:33:57 pm »
It's just this question I posted. Yeah, it is pure maths.
:)

Freaked12

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Re: Functions Question
« Reply #5 on: October 06, 2010, 10:52:53 pm »
A function f is one-to-one if it never happens that a is not equal to  b, but f(a) = f(b). Equivalently, one-to-one functions are those functions whose graphs pass the horizontal line test: every horizontal line passes through at most one point of its graph.

So by looking at the graph the largest value through which the horizontal line passes through is 3/2 pie

Freaked12

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Re: Functions Question
« Reply #6 on: October 06, 2010, 11:09:56 pm »
and the last part is already done

and he explained it quite clearly.


Specify what you are not getting?