How do you find two positive and negative Coterminal angles?

Asked By: Sohayla Buenache | Last Updated: 17th March, 2020
Category: science space and astronomy
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To find a positive and a negative angle coterminal with a given angle, you can add and subtract 360° if the angle is measured in degrees or 2π if the angle is measured in radians . Example 1: Find a positive and a negative angle coterminal with a 55° angle.

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Besides, how do you find two Coterminal angles in radians?

Finding coterminal angles is as simple as adding or subtracting 360° or 2π to each angle, depending on whether the given angle is in degrees or radians. There are an infinite number of coterminal angles that can be found.

One may also ask, what is the Coterminal angle of 60? Therefore, 60 degrees and -300 degrees are coterminal angles. The -300 degree rotation is pictured here. Infinitely many other angles are coterminal to 60 degrees. Each time you add or subtract a multiple of 360 degrees to 60 degrees, you will end up with a coterminal angle of 60 degrees.

Likewise, people ask, what is the Coterminal angle of 420?

Subtract 360° 360 ° from 420° 420 ° . The resulting angle of 60° 60 ° is positive, less than 360° 360 ° , and coterminal with 420° 420 ° .

Is 185 and Coterminal?

175° and -185° Coterminal Angles Coterminal angles are angles drawn in standard position that have a common terminal side. In this illustration, only the negative angle is labeled with the proper degree measure.

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Can Coterminal angles be negative?

To find a positive and a negative angle coterminal with a given angle, you can add and subtract 360° if the angle is measured in degrees or 2π if the angle is measured in radians . Example 1: A −305° angle and a 415° angle are coterminal with a 55° angle.

What is the Coterminal angle of 120?

120° and -240° Coterminal Angles.

How do you make a negative angle positive?

When measured in the negative direction its will be -90°. We simply subtract 270 from 360. Given a negative angle, we add 360 to get its corresponding positive angle. When an angle is -360°, it implies that the object made more than one cycle in clockwise direction.

Are reference angles always positive?

Reference Angles. A reference angle for a given angle in standard position is the positive acute angle formed by the $x$-axis and the terminal side of the given angle. Reference angles, by definition, always have a measure between 0 and .

How do you find supplementary angles?


Supplementary Angles
  1. Let the measure of one of the supplementary angles be a .
  2. Measure of the other angle is 2 times a .
  3. So, measure of the other angle is 2a .
  4. If the sum of the measures of two angles is 180° , then the angles are supplementary.
  5. So, a+2a=180°
  6. 3a=180°
  7. To isolate a , divide both sides of the equation by 3 .
  8. 3a3=180°3 a=60°

What is the Coterminal angle of 45?

Coterminal Angles are angles in standard position that have the same Initial Side and the same Terminal side. For example 45°, 405° and -315° are coterminal angles because all three angles have the same initial side (the x axis) and they share a same terminal side.

What is Quadrantal angle?

A Quadrantal Angle is an angle in standard position with terminal side on the x-axis or y-axis. Some examples are the angles located at 0°, 90°, 180°, 270°, 360°, 450°, as well as -90°, -180°, -270°, -360°

What is a reference angle?

The reference angle is the positive acute angle that can represent an angle of any measure. The reference angle is always the smallest angle that you can make from the terminal side of an angle (ie where the angle ends) with the x-axis.

What are Coterminal and reference angles?

If two angles in standard position have the same terminal side, they are called coterminal angles. In the diagram at the left, +120º and -240º are coterminal angles. The reference angle is the acute angle (the smallest angle) formed by the terminal side of the given angle and the x-axis.

How do I find the length of an arc?


To find arc length, start by dividing the arc's central angle in degrees by 360. Then, multiply that number by the radius of the circle. Finally, multiply that number by 2 × pi to find the arc length.

What is a terminal angle?

Standard Position of an Angle - Initial Side - Terminal Side. An angle is in standard position in the coordinate plane if its vertex is located at the origin and one ray is on the positive x-axis. The ray on the x-axis is called the initial side and the other ray is called the terminal side.

How do you convert from degrees to radians?

To convert degrees to radians, take the number of degrees to be converted and multiply it by π/180. You can calculate this by converting both numbers into fractions. For example, to convert 120 degrees you would have 120 x π/180 = 120π/180.

What is a degree in geometry?

A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by ° (the degree symbol), is a measurement of a plane angle, defined so that a full rotation is 360 degrees. Because a full rotation equals 2π radians, one degree is equivalent to π180 radians.

How do you convert from radians to degrees?


To convert radians to degrees, the key is knowing that 180 degrees is equal to pi radians. Then multiply the measurement in radians by 180 divided by pi. For example, pi over 3 radians would be equal to 60 degrees.