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**Zzulu****Guest**

Alright, I have a math question here that I can't solve and don't really understand. I don't live in an English speaking country, so I'll try to keep the translation as 'Correct' as I can.

**"Show how you can calculate the angles between a straight line (right angle) and the x-axis by using the lines arch(?) and a trigonometric connection"**

**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 22,992

I think the question is about the relation between the equation of a straight line and the angle made with the x-axis.

y=mx+c is the equation of a straight line where m is the slope.

m = tanθ where θ is the angle made by the line with the x-axis.

When you are given the equation of a straight line,

first rewrite the equation in the form y = mx+c,

find m, then the angle made by the line with the x axis is

given by

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

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