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How do you find angle between two points when their co-ordinates are known?
Wiki User
∙ 12y ago
The angle between 2 points is 180 degree if you draw a straight line through. If you mean the angle which it slants by, try think of it with a right-angled triangle. Suppose the points are A (1,1) and B (2,3) and you want to find the bearing of B from A (bearing is angle it slants by from a vertically upright line, clockwise). If you want, you can sketch it on a paper to visualize things.
1) Find a point where the two lines for A and B will meet perpendicularly and upright from A (1,3)
2) Find the length AC and BC (it should be straightforward; AC is 2 units, BC is 1 unit)
3) Put them in the expression tan-1 (O/A) where tan-1 is tangent inverse, O is the length of the opposite line (BC for this case), A is the length of the adjacent line (AC for this case). You should get tan-1 (2/1) or tan-1 2 which gives 63.4 degrees (to one significant figure).
4) From that answer, I can tell you that the bearing of B from A is 063.4o (the "0" is necessary for bearings which has a fixed format of ***.* where * represents a number). You can also say that the line is tilted 26.6o upwards from a flat line.
Depending on question, you may need to alter this method slightly but this is one method that will work efficiently (when you can visualize it without drawing, it does get quite fast)
Wiki User
∙ 12y ago
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The line is x=0 otherwise known as the y-axis.
When coordinates of two geographical points are known and we calculate the distance between them Is the calculated distance the horizontal distance or the actual distance?
The horizontal distance. Points of latitude and longitude can't account for elevation.
What is the rate of change between any 2 points on a line?
We define the rate of change between any two linear points as the slope, and designate it with the letter m. m = delta y over delta x.
What is the second number in a order pair?
If cartesian coordinates are used then the second number in an ordered pair is the y coordinate, also known as the ordinate. If polar coordinates are used then the second number is the angle.
What is the relationship between the angle of incidence and the angle of of refraction known as?
The COEFFICIENT of Refraction.
What is the law flection?
I think you are asking about the law of reflection: The angle at which light hits an object, it reflects off at the same angle i.e. the angle of incidence equals the angle of reflection (The angle between the incident ray and the normal is known as the angle of incidence. The angle between the reflected ray and the normal is known as the angle of reflection)
What is stagger angle?
The angle between chord line and turbine axial direction ( also known as setting angle)
When the coordinates of two points (xy) and (-xy) what line of symmetry do the points share?
The line is x=0 otherwise known as the y-axis.
What is the length of a path between two points?
The Length of a path between two points is known as distance.
Angle between equinoctial and ecliptic known as?
The angle between the equinoctial and the ecliptic is known as the obliquity of the ecliptic. It is the angle between the plane of Earth's orbit around the Sun and the plane of the celestial equator. Currently, the obliquity of the ecliptic is about 23.5 degrees.
The difference in -coordinates is also known as the rise?
The difference in Y -coordinates is also known as the rise.
How are incident ray reflected ray normal related?
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No, a compass points towards the magnetic north pole, which is not the same as the geographic North Pole. The angle between the two poles is known as declination.
