Check out some similar questions!

pop000 · Jan 9, 2011, 09:49 AM

in the picture you can see the Function.
how many of the features of this Function are correct?

this is the features :
1)f(x)=1 if and only if x=0.5pi
2)f(2)=1
3)f(x)=sqrt3 if and only if x=2pi/3
4)f(-2)=-0.25pi

pop000 · Jan 9, 2011, 09:53 AM

Sure sure thanks for help :-)

ebaines · Jan 10, 2011, 09:25 AM

It woyuld make it less confung of all four of these were expressed consistently, in eth form arctan(x) = y, like this:

1) arctan $(\frac {\pi} 4) = 1$ ?

2) Arctan $(1) = 1$ ?

3) arctan $(\frac {\pi} {3}) = \sqrt {3}$ ?

4) arctan $(-1) = \frac {-\pi} 4$ ?

Now, recall that the arctan function yields an angle, usually expressed in radians. Can you finish this now?

pop000 · Jan 10, 2011, 12:26 PM

Well I know this "f(-2)=-0.25pi" is correct.
It think this is the only things who is correct here yes?

Thank you

pop000 · Jan 10, 2011, 12:28 PM

*i think

pop000 · Jan 10, 2011, 12:30 PM

Here only NO 4 is correct I think.

ebaines · Jan 10, 2011, 01:57 PM

Right - number 4 is the only correct one.

pop000 · Jan 11, 2011, 03:36 AM

Thank you :)