Trig Ratio Basics

Front

What is the ratio for sine?

Back

opp/hyp

Front

What is the cosine of angle P?

Back

q/r

Front

What is the ratio for tangent?

Back

opp/adj

Front

If you are given 2 of the sides to an obtuse triangle, which trig function should you use to find the other side?

Back

You can only use trig functions on right triangles.

Front

If you are given the two sides that are not the hypotenuse, which trig function should you use?

Back

tangent

Front

Define sine in terms of a right triangle.

Back

Sine is the ratio of the length of the opposite side to the length of the hypotenuse.

Front

Define cosine in terms of a right triangle.

Back

Cosine is the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

Define tangent in terms of a right triangle.

Back

Tangent is the ratio of the length of the opposite side to the length of the adjacent side.

Front

What is the Pythagorean theorem?

Back

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

Front

What is the relationship between sine and cosine?

Back

Sine and cosine are complementary functions; sin(θ) = cos(90° - θ).