Trig Functions

Front

What is the mnemonic to remember trigonometric ratios?

Back

Soh Cah Toa

Front

What is the sine ratio for an angle in a right triangle?

Back

sin(θ) = opposite side / hypotenuse

Front

What is the cosine ratio for an angle in a right triangle?

Back

cos(θ) = adjacent side / hypotenuse

Front

What is the tangent ratio for an angle in a right triangle?

Back

tan(θ) = opposite side / adjacent side

Front

What trig function is used when given the opposite side and hypotenuse?

Back

Sine (sin) function

Front

What trig function is used when given the adjacent side and hypotenuse?

Back

Cosine (cos) function

Front

What trig function is used when given the opposite and adjacent sides?

Back

Tangent (tan) function

Front

Can trigonometric functions be used on obtuse triangles?

Back

No, trigonometric functions are defined for right triangles only.

Front

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

Back

sin(θ) = cos(90° - θ) and cos(θ) = sin(90° - θ)

Front

What is the Pythagorean identity involving sine and cosine?

Back

sin²(θ) + cos²(θ) = 1