sin cos tan (missing side)

Front

What is the definition of sine (sin) in a right triangle?

Back

Sine (sin) is the ratio of the length of the opposite side to the length of the hypotenuse.

Front

What is the definition of cosine (cos) in a right triangle?

Back

Cosine (cos) is the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

What is the definition of tangent (tan) in a right triangle?

Back

Tangent (tan) is the ratio of the length of the opposite side to the length of the adjacent side.

Front

How do you set up an equation using cosine to find a missing side?

Back

Use the formula: cos(angle) = adjacent/hypotenuse.

Front

If cos 72 = 6 / x, how do you solve for x?

Back

Rearrange to x = 6 / cos(72).

Front

What is the approximate value of x if cos 72 = 0.309?

Back

x ≈ 19.4 (rounded to the nearest tenth).

Front

Which trigonometric function would you use to find the adjacent side?

Back

Use the cosine function.

Front

If you know the opposite side and the angle, which function do you use to find the hypotenuse?

Back

Use the sine function.

Front

What is the relationship between sine, cosine, and tangent?

Back

tan(angle) = sin(angle) / cos(angle).

Front

How do you round a number to the nearest tenth?

Back

Look at the hundredths place; if it's 5 or more, round up.