Trig Ratios

Front

What is the definition of the hypotenuse in a right triangle?

Back

The hypotenuse is the longest side of a right triangle, opposite the right angle.

Front

What are the three primary trigonometric ratios?

Back

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

Front

What is the formula for Sine?

Back

Sine = Opposite side / Hypotenuse.

Front

What is the formula for Cosine?

Back

Cosine = Adjacent side / Hypotenuse.

Front

What is the formula for Tangent?

Back

Tangent = Opposite side / Adjacent side.

Front

How can you remember the trigonometric ratios?

Back

Use the mnemonic 'Soh Cah Toa'.

Front

In a right triangle, if angle x is 30 degrees, what is the sine of angle x?

Back

Sine(30°) = 1/2.

Front

In a right triangle, if angle x is 45 degrees, what is the cosine of angle x?

Back

Cosine(45°) = √2/2.

Front

If the opposite side is 4 and the adjacent side is 3, what is the tangent of the angle?

Back

Tangent = Opposite / Adjacent = 4/3.

Front

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

Back

Sine(θ) = Cosine(90° - θ).