How to write mathematical equations in relation dialog box, such as cuberoot, cot, tan, cosine etc??

[srajbhar]

Hi All,

Let take is a parameter(d1), ds,g1 and toe...
now i want to write equation for below farmulaes, how can i write, please suggest...

regards & thanks!
Shravan

[BenLoosli]

It should all be explained in the help section under expressions.

I am not sure about the cuberoot value.

[TomU]

I don't see cubed root, but this should give you everything else:

http://support.ptc.com/help/creo/creo_pma/usascii/#page/fundamentals%2Ffundamentals%2Ffund_seven_sub%2FAbout_Functions_Used_in_Relations.html%23

[KenFarley]

R1max = 0.505 * d1 + 0.069*d1^(1/3)

ds = p * cos ( tau / 2 ) / sin ( tau / 2 ) - 1.04 * g1 - 0.76

The only term I'm not sure of is the fractional "power", "^(1/3). I've never had need to use such an expression. You should also take a look at the reference materials people have suggested. The syntax is similar to most programming languages with respect to operator precedence, etc.

All "variables" above ( such as "tau", "d1", "R1max", etc.) are assumed to have been defined as parameters or model dimensions.

[srajbhar]

It worked! thanks!

[DaveMartin]

This sounds like an excellent case for using an embedded Mathcad worksheet instead of Relations.

Mathcad Express is free from PTC, and no additional licenses are necessary to embed a worksheet. This functionality is available from the Applications tab.

[jhaston-3]

Unless I'm mistaken, these equations are of fundamental importance in the urine extraction process.
Or as we call it in Scotland, taking the piss!

??

[RoyCrerar]

Hi, for power and root functions the format is ^x and ^-x, so cube root will be ^0.333 or ^1/3

[KenFarley · Accepted solution]

Gotta put that 1/3 in parentheses. Operator precedence.

27^1/3 = ( 27 ^ 1 ) / 3 = 27 / 3 = 9

27^(1/3) = 27^0.33333333 = 3