Right Triangle Trig Classwork- 2/28

Front

What is the definition of cosine in a right triangle?

Back

Cosine (cos) is the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

What is the definition of sine in a right triangle?

Back

Sine (sin) is the ratio of the length of the opposite side to the length of the hypotenuse.

Front

What is the definition of tangent in a right triangle?

Back

Tangent (tan) is the ratio of the length of the opposite side to the length of the adjacent side.

Front

What does SOH stand for in trigonometry?

Back

SOH stands for Sine = Opposite/Hypotenuse.

Front

What does CAH stand for in trigonometry?

Back

CAH stands for Cosine = Adjacent/Hypotenuse.

Front

What does TOA stand for in trigonometry?

Back

TOA stands for Tangent = Opposite/Adjacent.

Front

How do you find the cosine of an angle using a calculator?

Back

Use the cosine function (cos) and input the angle in degrees or radians.

Front

What is the relationship between sine and cosine for complementary angles?

Back

sin(90° - x) = cos(x) and cos(90° - x) = sin(x).

Front

What is the Pythagorean theorem?

Back

In a right triangle, a² + b² = c², where c is the hypotenuse.

Front

How do you calculate the angle using the inverse cosine function?

Back

Use cos⁻¹(value) to find the angle whose cosine is the given value.