"This value must be a scalar" error when trying to graph an if statement

[regsy]

Hi,

When I'm trying to graph F(theta) an error tells me that the value must be a scalar and by error tracing, I found that in the first part of the if statement, the same error pops up. If anyone could help me out here that would be great.

Thanks 

[ValeryOchkov · Accepted solution]

Change the begin

BeginEnd

[regsy]

Ah okay I see

Thank you very much!

[ValeryOchkov]

I am glad to help you!

And second!

Better use not the Find but root function.

The Find is for 2, 3 and more equations.

And The root works in Mathcad Express - the free of charge version of Prime

[ValeryOchkov]

and more

[regsy]

Thank you! This is good to know

[ValeryOchkov]

You welcome!