Trig Practice: SOH CAH TOA

What is the value of Sin 30°?

• 1/2

• 1/3

• √2/2

• 0

What is the value of Cos 60°?

• 1/2

• 1/3

• √3/2

• 0

What is the cosine function used for in trigonometry?

• To find the ratio of the length of the opposite side to the hypotenuse in a right triangle.

• To find the ratio of the length of the adjacent side to the hypotenuse in a right triangle.

• To calculate the area of a triangle.

• To determine the angles of a triangle.

What does SOH CAH TOA stand for?

• SOH: Sine = Opposite/Hypotenuse, CAH: Cosine = Adjacent/Hypotenuse, TOA: Tangent = Opposite/Adjacent.

• SOH: Sine = Adjacent/Hypotenuse, CAH: Cosine = Opposite/Hypotenuse, TOA: Tangent = Opposite/Adjacent.

• SOH: Sine = Opposite/Adjacent, CAH: Cosine = Opposite/Hypotenuse, TOA: Tangent = Adjacent/Hypotenuse.

• SOH: Sine = Opposite/Hypotenuse, CAH: Cosine = Opposite/Adjacent, TOA: Tangent = Adjacent/Hypotenuse.

If the adjacent side is 21 and the hypotenuse is 29, what is Cos C?

• 0.72

• 0.65

• 0.79

• 21/29

What is the value of Tan 45°?

• 0

• 1

• √2

• ∞

If you know the hypotenuse and the opposite side, which function do you use to find the angle?

• Use the inverse sine function (sin⁻¹) to find the angle.

• Use the cosine function (cos) to find the angle.

• Use the tangent function (tan) to find the angle.

• Use the inverse cosine function (cos⁻¹) to find the angle.

What is the sine function used for in trigonometry?

• To find the ratio of the length of the opposite side to the hypotenuse in a right triangle.

• To calculate the area of a triangle.

• To determine the length of the adjacent side in a right triangle.

• To find the angle measures in a triangle.

What is the Pythagorean theorem?

• In a right triangle, a² + b² = c², where c is the hypotenuse and a and b are the other two sides.

• In any triangle, the sum of the angles is 180 degrees.

• In a right triangle, the area is equal to half the product of the two shorter sides.

• In a triangle, the longest side is always opposite the largest angle.

If the hypotenuse is 50 and one side is 30, how do you find the other side?

• Use the Pythagorean theorem: b = √(c² - a²)

• Add the lengths of the two sides together

• Multiply the lengths of the two sides

• Subtract the length of one side from the hypotenuse