Basic Trig Ratios

Front

What are the basic trigonometric ratios?

Back

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

Front

What does SOH-CAH-TOA stand for?

Back

SOH: Sine = Opposite/Hypotenuse, CAH: Cosine = Adjacent/Hypotenuse, TOA: Tangent = Opposite/Adjacent

Front

What is the sine of an angle in a right triangle?

Back

The ratio of the length of the opposite side to the length of the hypotenuse.

Front

What is the cosine of an angle in a right triangle?

Back

The ratio of the length of the adjacent side to the length of the hypotenuse.

Front

What is the tangent of an angle in a right triangle?

Back

The ratio of the length of the opposite side to the length of the adjacent side.

Front

If the opposite side is 3 and the hypotenuse is 5, what is sin(A)?

Back

sin(A) = 3/5

Front

If the adjacent side is 4 and the hypotenuse is 5, what is cos(A)?

Back

cos(A) = 4/5

Front

If the opposite side is 3 and the adjacent side is 4, what is tan(A)?

Back

tan(A) = 3/4

Front

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

Back

sin(30°) = 1/2

Front

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

Back

cos(45°) = √2/2