Understanding Trigonometric Functions

What is the radius of the unit circle used to define sine and cosine?

• 1

• 2

• 0.5

• 10

What does the cosine of an angle Theta represent in the unit circle?

• None of the above

• Vertical distance from x-axis

• Horizontal distance from y-axis

• Radius of the circle

What is the relationship between cosine of Theta, and sine of pi over 2 minus Theta?

(pi over 2=90degrees, in other words the complement)

• None of the above

• They are equal

• They are opposites

• They are reciprocals

Which function is defined as the ratio of the sine of Theta to the cosine of Theta?

• Tangent

• Cotangent

• Secant

• Cosecant

What is the value of secant of Theta in terms of cosine?

• 1 divided by Cosine Theta

• Cosine Theta

• Sine Theta

• 1 divided by Sine Theta

What happens to the tangent of Theta when Theta equals pi over 2?

• It equals 0

• It is undefined

• It equals 1

• It equals -1

Which trigonometric function is undefined when Theta is zero?

• Sine

• Cosine

• Secant

• Cotangent

Which function is defined as the reciprocal of sine?

• Cosine

• Cosecant

• Secant

• Cotangent

What is the maximum value that the sine function can attain?

• 0

• Infinity

• 1

• -1

Which function has absolute values that are always greater than or equal to one?

• Sine

• Tangent

• Cosine

• Secant