Trig Ratios

Front

What are the three primary trigonometric ratios?

Back

Sine (sin), Cosine (cos), Tangent (tan).

Front

What is the mnemonic to remember the trigonometric ratios?

Back

Soh Cah Toa.

Front

What is the sine ratio in a right triangle?

Back

sin(θ) = opposite side / hypotenuse.

Front

What is the cosine ratio in a right triangle?

Back

cos(θ) = adjacent side / hypotenuse.

Front

What is the tangent ratio in a right triangle?

Back

tan(θ) = opposite side / adjacent side.

Front

In a right triangle, if the opposite side is 3 and the hypotenuse is 5, what is sin(θ)?

Back

sin(θ) = 3/5.

Front

In a right triangle, if the adjacent side is 4 and the hypotenuse is 5, what is cos(θ)?

Back

cos(θ) = 4/5.

Front

In a right triangle, if the opposite side is 3 and the adjacent side is 4, what is tan(θ)?

Back

tan(θ) = 3/4.

Front

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

Back

sin(θ) = cos(90° - θ).

Front

What is the Pythagorean identity involving sine and cosine?

Back

sin²(θ) + cos²(θ) = 1.