Unit 5 Test: Right Triangle Trigonometry (First Half of Test)

Front

What does SOH CAH TOA stand for in trigonometry?

Back

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

Front

How do you find the missing angle in a right triangle using inverse trigonometric ratios?

Back

Use the inverse functions: sin⁻¹, cos⁻¹, or tan⁻¹ on the ratio of the sides.

Front

What is the value of sin(30°)?

Back

1/2.

Front

What is the value of cos(60°)?

Back

1/2.

Front

What is the value of tan(45°)?

Back

1.

Front

What are the special right triangles and their ratios?

Back

45°-45°-90° triangle: sides are in the ratio 1:1:√2; 30°-60°-90° triangle: sides are in the ratio 1:√3:2.

Front

How do you use special right triangles to find the length of a side?

Back

Use the known ratios of the special triangles to find the unknown side.

Front

What is the sine of an angle in a right triangle?

Back

The ratio of the length of the opposite side to the length of the hypotenuse.

Front

What is the cosine of an angle in a right triangle?

Back

The ratio of the length of the adjacent side to the length of the hypotenuse.

Front

What is the tangent of an angle in a right triangle?

Back

The ratio of the length of the opposite side to the length of the adjacent side.