Understanding Angles and Reference Angles

The video tutorial explains how to find the reference angle and the smallest positive angle for a point on the terminal side of an angle. It starts by plotting the point (5, -7) and calculating the reference angle using the inverse tangent function. The tutorial then demonstrates how to find the smallest positive angle by subtracting the reference angle from 2π radians. An alternative method using coterminal angles is also discussed.

What is the initial step in solving the problem of finding the reference angle for a point on the terminal side of an angle?

• Determining the length of the hypotenuse

• Finding the midpoint of the line

• Calculating the sine of the angle

• Plotting the point on the coordinate plane

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CCSS.HSG.SRT.C.6

How is the tangent of an angle defined in terms of coordinates?

• y divided by x

• y minus x

• x divided by y

• x multiplied by y

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CCSS.HSG.SRT.C.8

What function is used to solve for the angle when given the tangent value?

• Exponential function

• Inverse tangent function

• Cosine function

• Sine function

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CCSS.HSF.TF.A.1

Why is it important to ensure the calculator is in radian mode when finding the angle?

• To simplify the calculation process

• To ensure the angle is measured in radians

• To ensure the angle is measured in degrees

• To avoid errors in decimal places

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CCSS.HSF.TF.A.2

What is the significance of a negative angle result from the calculator?

• It indicates the angle is in the second quadrant

• It indicates the angle is in the third quadrant

• It indicates the angle is in the first quadrant

• It indicates the angle is in the fourth quadrant

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CCSS.8.G.A.5

What is the reference angle in this context?

• The angle between the terminal side and the origin

• The angle between the terminal side and the negative x-axis

• The angle between the terminal side and the positive x-axis

• The angle between the terminal side and the y-axis

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CCSS.HSF.TF.B.7

How is the smallest positive angle containing the point calculated?

• By adding the reference angle to π

• By subtracting the reference angle from 2π

• By multiplying the reference angle by 2

• By dividing the reference angle by 2

What is an alternative method to find the angle using coterminal angles?

• Dividing the angle by 2

• Subtracting 2π from the angle

• Multiplying the angle by 2

• Adding 2π to the angle

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CCSS.HSF.TF.A.1

What is the approximate value of the smallest positive angle in radians?

• 6.2832 radians

• 5.3327 radians

• 4.7124 radians

• 3.1416 radians

What is the relationship between angle a and angle a prime?

• They are complementary

• They are supplementary

• They are coterminal

• They are equal