Best Answer

tan θ = sin θ / cos θ

tan θ = (y2 - y1) / (x2 - x1)

θ = tan-1((y2 - y1) / (x2 - x1))

More articulate answer:

To begin with, I will refer to the "where 0 is right it goes counter clockwise" as the 'Polar Clock'. A polar clock has 0* facing the right, 90* facing up, 180* facing left, 270* facing down, and 360* once again facing right.

In order to find the answer, we must build a right triangle using the two points (in this example 1,1 and 3,5) as the corners attached by the longest side (opposite the right angle). To find the lengths of the two shorter sides, take corresponding values of your points and subtract them. In this example, 5-1 = 4, the vertical line (y2 - y1), and 3-1 = 2, the horizontal line (x1 - x2).

Once you know the value of these two sides, a trigonometric function can be used to determine the position on the polar clock of the longest side (between the two points). The function Tangent (tan) is equal to the opposite side of the triangle divided by the adjacent side of the triangle. In this example, where θ is the unknown angle, tan(θ) = 4/3.

In order to solve this in a timely fashion, it is recommended to use a calculator. In order to use a calculator, you must change the notation from [tan(θ) = 4/3] to [θ = tan-1(4/3)]. The easiest way to describe tan-1 is that it is the opposite of tan. To find the angle, simply type [tan-1(4/3)] into any suitable calculator.

As listed in the first example, the formula is as follows:

θ = tan-1((y2 - y1) / (x2 - x1))

Q: How do you find the direction from x1y1 to x2y2 in 360 where 0 is right it goes counter clockwise and Y goes down X goes right?

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There is a nut on the bottom of the pendulum to adjust the speed. Turning it clockwise speeds it up, counter clockwise slows it down

Right.

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Counter Clockwise. Push air down (down position on most fans)

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clockwise

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the direction of the earths rotation is right The direction of the earth's rotation is East. There are many other answers depending on the position and orientation of the observer relative to the earth. For example, if the observer is facing the globe from a position above the north pole, the rotation appears to be counter-clockwise. If the observer is facing the globe from a position above the south pole, the rotation appears to be clockwise. If the observer is facing the globe from a position above the equator, the rotation appears to be to the right if the observer is oriented so that North is "up" and south is "down". However, if the observer is "upside down"(a northern hemisphere bias), the rotation appears to be to the left.

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Turning the window crank in a counter clockwise direction, the window will go down, reverse direction to raise it. If you are speaking of the rear window the switch is on the a/c control panel. Down makes the window go down and up is up

Counter clockwise (or anti-clockwise) when looking down onto the north pole.

If you stood at the north pole and jumped up to look down on our solar system, the earth would be orbiting counter-clockwise, as well as spinning counter-clockwise. The moon would also be orbiting counter-clockwise, as well as spinning counter-clockwise at 1 revolution per orbit. The Earth then rotates 366.25 times per year approximately, which makes for 365.25 days since one is taken up by orbiting the sun.