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What formula is used to calculate the area of a circle?

• Area = πr^2

• Area = 2πr^2

• Area = 2πr

• Area = πr

How is the arc length of a circle sector determined?

• Arc Length = (Central Angle/2π) * Radius

• Arc Length = (Central Angle/2π) * Area

• Arc Length = (Central Angle/360) * Circumference

• Arc Length = (Central Angle/360) * Diameter

How do you calculate the sector area of a circle?

• Sector Area = (Central Angle/2π) * Circumference

• Sector Area = (Central Angle/2π) * Diameter

• Sector Area = (Central Angle/360) * πr^2

• Sector Area = (Central Angle/360) * 2πr

What is a reference angle?

• The angle between two tangents of a circle

• The largest angle in a triangle

• The angle formed by the terminal side of an angle and the x-axis

• The angle opposite the hypotenuse in a right triangle

How do you find the reference angle in radians for an angle in quadrant III?

• Subtract the angle from 2π

• Subtract π from the angle

• Add π to the angle

• Subtract the angle from π

What is the reference angle for an angle of -50°?

• -130°

• 130°

• -50°

• 50°

What is the equation of a circle with a radius of 1 unit centered at the origin?

• x^2 + y^2 = 2

• x^2 + y^2 = 1

• x^2 + y^2 = 0

• x^2 + y^2 = π

Which trigonometric function is defined as opposite over adjacent?

• Cosecant

• Sine

• Cosine

• Tangent

If a point on the terminal side of an angle in standard position is (-4, 3), what is the cosine of the angle?

• -4/5

• 3/5

• -3/5

• 4/5

What is the sine of an angle whose terminal side passes through the point (-4, 3)?

• -4/5

• 4/5

• -3/5

• 3/5