# help with tan equation

• Jan 28th 2010, 05:35 PM
ryan18
help with tan equation
Consider the following function. http://www.webassign.net/cgi-bin/sym...9-x%29%2Fx%5E3

(a) Evaluate h(x) for the following values of x. (Give your answer correct to six decimal places.)

xf(x) 1Enter a number.
1 0.5 Enter a number.
2 0.1 Enter a number.
3 0.05 Enter a number.
4 0.01 Enter a number.
5 0.005 Enter a number.
• Jan 28th 2010, 05:59 PM
Stroodle
Just replace each $\displaystyle x$ in the function with the value given when you enter it into your calculator.
• Jan 28th 2010, 06:21 PM
ryan18
I tried that, but its not counting it correct. For example:

$\displaystyle tan(0.5)=0.00872686$ Then $\displaystyle \frac{0.00872686-0.5}{0.5^3}$ which give you -3.930185...which is not correct.
• Jan 28th 2010, 06:24 PM
pickslides
Your equation is $\displaystyle h(x)$ but in your table the header is $\displaystyle f(x)$ is this correct?
• Jan 28th 2010, 06:25 PM
ryan18
Actually yes, lol, I dont know how they messed that up, but yes that is what it shows on the website.
• Jan 28th 2010, 06:26 PM
Stroodle
Maybe you need to change the mode on your calculator; I'm getting 0.370420 for that question.
• Jan 28th 2010, 06:27 PM
ryan18
Shouldnt it be in degrees?
• Jan 28th 2010, 06:28 PM
Stroodle
Haha. A common mistake. I've made it so many times now that I always watch out for it :)

I think it should be in Radian mode.
• Jan 28th 2010, 06:30 PM
ryan18
*facepalm*