How to find the slope?

1. Dec 8, 2003

to_kool2003

how to find the slope???

ok, I'm really confused with this Question: "Whats the slope of a 0 degree angle, and if so how did u do it or how can u prove it. I need a reply because it is urgent. thx for replying

2. Dec 8, 2003

gnome

Uh, what's the slope of any angle?

A line has a slope. An angle doesn't. You'll have to get the question straight before you have any hope of answering it.

3. Dec 8, 2003

StephenPrivitera

That sounds like nonsense to me. The slope of an angle?

4. Dec 8, 2003

to_kool2003

i meant when u graph the angle in a coordianate plane the angle has a rise and run so there should be a slope

5. Dec 8, 2003

himanshu121

If You plot the graph with certain coordinates then

slope $$\tan\Theta=\frac{\Delta(y)}{\Delta(x)}$$

Last edited: Dec 8, 2003
6. Dec 8, 2003

StephenPrivitera

Ah a line which makes an angle A with a horizontal line has slope tanA.

7. Dec 8, 2003

to_kool2003

what do u mean tanA, Im asking for ppl to show me how to get the slope of a 0 degree angle, and u could graph an angle in a coordianate plane so there must be a run and rise, u could get the slope......................... I do think there's a solution

8. Dec 8, 2003

himanshu121

What is A for Zero degree, it is zero so u know calculate this prob.

9. Dec 8, 2003

to_kool2003

huh?
[?]

10. Dec 8, 2003

gnome

If you're talking about a line that makes an angle
$$\theta = 0 ~degrees$$ with the x-axis, the
$$slope = \frac{\Delta y}{\Delta x} = tan~\theta = 0$$

To put it in your terms, the rise is 0, so the slope is 0.

But remember, that is the slope of the line, not the angle.

11. Dec 8, 2003

to_kool2003

ok......... That answer part of my question but I still think something is missing[?]

12. Dec 8, 2003

StephenPrivitera

out of curiosity, where did you find this question?

13. Dec 8, 2003

himanshu121

i wonder what after the reply of gnome is missing

14. Dec 9, 2003

HallsofIvy

Staff Emeritus
Did you ever actually draw such a line??

A line with 0 angle is horizontal. All points that it passes through will have the same y component. What do you think the "rise" is??

15. Dec 9, 2003

to_kool2003

ok I go the answer and gnome was right, thx

16. Dec 10, 2003

HallsofIvy

Staff Emeritus
Since you have the answer now:

In general the slope of any straight line making angle &theta; with the x-axis is tan(&theta;). Of course, tan(0)= 0.

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