Converting Rectangular Coordinates to Polar Coordinates

The video tutorial explains how to convert points from rectangular to polar coordinates using two examples. The first example is straightforward, involving the point (4,1), while the second example is more complex, dealing with the point (-2,3). The tutorial covers the calculation of R and theta, the use of trigonometric equations, and the importance of visualizing the problem. It emphasizes the non-uniqueness of polar coordinates and the need to consider the range of inverse tangent when determining angles.

What is the first step in converting rectangular coordinates to polar coordinates?

• Convert the coordinates to radians.

• Calculate the distance R.

• Identify the given coordinates in rectangular form.

• Determine the angle Theta.

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CCSS.HSN.CN.B.4

Which equation is used to find the distance R in polar coordinates?

• R = X + Y

• R = X/Y

• R^2 = X^2 + Y^2

• R = X * Y

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CCSS.HSG.SRT.C.6

What is the tangent of Theta equal to in terms of X and Y?

• Y^2 - X^2

• X^2 + Y^2

• Y/X

• X/Y

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CCSS.HSG.SRT.C.6

For the point (4,1), what is the approximate value of Theta in degrees?

• 30.0 degrees

• 60.0 degrees

• 45.0 degrees

• 14.0 degrees

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CCSS.7.NS.A.1C

In the first example, what is the value of R for the point (4,1)?

• Square root of 10

• Square root of 20

• Square root of 13

• Square root of 17

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CCSS.6.NS.C.6B

What is the given point in the second example?

• (-2,3)

• (3,2)

• (-3,2)

• (2,-3)

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For the point (-2,3), what is the value of R?

• Square root of 17

• Square root of 20

• Square root of 10

• Square root of 13

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What is the range for the inverse tangent function?

• 0 to PI

• 0 to 2PI

• -PI/2 to PI/2

• -PI to PI

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CCSS.HSN.CN.B.4

What is the correct angle Theta for the point (-2,3) with a positive R?

• 123.7 degrees

• 90 degrees

• 56.3 degrees

• 180 degrees

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CCSS.HSN.CN.B.4

Why is it important to sketch the point when converting coordinates?

• To check if the point is in the first quadrant.

• To visualize the problem and avoid mistakes.

• To ensure the calculator is in the correct mode.

• To avoid using the wrong formulas.

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CCSS.HSN.CN.B.4