Simply cannot get my calculator to give me the correct answer?

[Jowin86]

Simply cannot get my calculator to give me the correct answer!?

Homework Statement

I'm going through a worked example I did in a tutorial and cannot get the same answer we did in class with my calc!?

Homework Equations

Damping ratio = the square root of E² / 4∏² n² E²

Where E=2.526 n=2

The Attempt at a Solution

I'm getting 0.0796 , doing 4x(pie²) and 0.0398 doing (4xpie)²

The answer from tutorial is 0.1971 and is deffinately correct.

I've broken each bit down and worked it out separately and put it into the calc then in the simplified way but still I'm not getting the right answer :(

 

[Doc Al]

Damping ratio = the square root of E² / 4∏² n² E²

Can you retype that equation, using parentheses as needed. It looks like you have E² twice.

 

[Jowin86]

Yeah that what I've got written down in my notes. Maybe I copied it down wrong?

 

[Doc Al]

Yeah that what I've got written down in my notes. Maybe I copied it down wrong?

You must have. You have an E² in numerator and denominator, which would cancel out. (I doubt that's what was meant.)