#### Jomo

##### Elite Member

- Joined
- Dec 30, 2014

- Messages
- 3,535

Someone asked me this problem and I get a different answer than their professor.

The EXACT wording is : g (f (x)) =? if f = sin and g is the function which calculates the diameter of a circle given its radius.

If I understand the function g, then g(x) = 2x. Hence g(sin(x)) = 2sin(x). However the instructor claims that g (f (x)) = 2pi*sin(x).

Who is correct? If the instructor is correct then please state why.

Thanks!

g (f (x)) =? if f = sin and g is the function which calculates the diameter of a circle given its radius.

The EXACT wording is : g (f (x)) =? if f = sin and g is the function which calculates the diameter of a circle given its radius.

If I understand the function g, then g(x) = 2x. Hence g(sin(x)) = 2sin(x). However the instructor claims that g (f (x)) = 2pi*sin(x).

Who is correct? If the instructor is correct then please state why.

Thanks!

g (f (x)) =? if f = sin and g is the function which calculates the diameter of a circle given its radius.

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