Unit Circle and Trigonometric Functions Quiz

What is the radius of the unit circle?

• 0.5

• 1

• 2

• 3

In a right triangle, what is the sine of an angle defined as?

• Opposite over Hypotenuse

• Adjacent over Hypotenuse

• Adjacent over Opposite

• Hypotenuse over Opposite

What does the x-coordinate represent in the unit circle?

• Cosecant of theta

• Tangent of theta

• Cosine of theta

• Sine of theta

Which trigonometric function is the reciprocal of sine?

• Secant

• Cotangent

• Tangent

• Cosecant

What is the reciprocal of cosine called?

• Secant

• Cosecant

• Cotangent

• Tangent

Why can't we divide by zero in the real number system?

• It results in a negative number

• It results in zero

• It results in infinity

• It is undefined

At which angle is tangent undefined due to division by zero?

• 360 degrees

• 180 degrees

• 90 degrees

• 0 degrees

What is the sine of pi over 6?

• 1/2

• 1

• √3/2

• 0

What is the cosine of pi over 6?

• 0

• √3/2

• 1/2

• 1

What is the tangent of pi over 6 after rationalizing the denominator?

• 1

• √3/3

• 1/√3

• √3