Say you take the point of origin as 0,0. And you find a point on the graph to be at 7, 2.
How do I determine what angle this is?
Would I use sin y/cos x?
which would be sin 2/cos 7
2007-08-12 05:14:18 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
I have to assume you mean the angle made with the x-axis. In that case, draw a segment down from the point (7,2) to the x-axis and you see your right triangle.
Now you can see that the angle you want has a tangent of 2/7.
You can find the angle by finding the arctan of 2/7. You should get about 16 degrees.
2007-08-12 05:28:34 · answer #1 · answered by Marley K 7 · 0⤊ 0⤋
first I assume you mean the angle between the x axis and the line from the origin to your point because angles only exist between lines not points.
If that is the case then:
If and only if you start from the origin (0,0) your angle is Arctan (2/7) at any other time when the starting point is not the origin the calculations are more involved.
2007-08-12 12:34:09 · answer #2 · answered by 037 G 6 · 0⤊ 0⤋
sin means the opposite side over hypotenuses and
cos the adjacent side over hypotenuses.
Tangent is the opposite side over adjacent side or
sin x/cos x but sin and cos must have the same angle x.
You can't have sin 2, the argument for sine is an angle not a side.
2007-08-12 13:03:23 · answer #3 · answered by Theta40 7 · 0⤊ 0⤋
tan x = (2-0)/(7-0)
x = arctan(2/7)
2007-08-12 12:27:41 · answer #4 · answered by sahsjing 7 · 0⤊ 0⤋