Mastering Trigonometric Ratios

What is the sine of a 30-degree angle?

• 0.25

• 1.0

• 0.5

• 0.75

Calculate the cosine of a 45-degree angle.

• 0.8660

• 1.0

• 0.7071

• 0.5

If sin(θ) = 0.5, what is θ in degrees?

• 120°

• 60°

• 90°

• 30° and 150°

What is the tangent of a 60-degree angle?

• √2

• 0

• 1

• √3

Find the value of cos(30°).

• 0

• 1/2

• √2/2

• √3/2

If tan(θ) = 1, what is the value of θ?

• θ = 60° + n*180°, n ∈ ℤ

• θ = 30° + n*180°, n ∈ ℤ

• θ = 45° + n*180°, n ∈ ℤ

• θ = 90° + n*180°, n ∈ ℤ

What is the relationship between sine and cosine?

• Cosine is the only trigonometric function used in right triangles.

• Sine and cosine are related trigonometric functions that represent ratios of sides in a right triangle.

• Sine is only defined for acute angles.

• Sine and cosine are the same function.

Calculate sin(90°).

• 0

• -1

• 1.5

• 1

If a right triangle has an angle of 30°, what is the ratio of the opposite side to the hypotenuse?

• 1:1

• 2:3

• 1:3

• 1:2

What is the value of tan(45°)?

• 0

• 2

• 1

• 1.5