HG 8-2 Trig Ratios Flashcardizz

Front

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

Back

sinA = opposite side / hypotenuse (a/c)

Front

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

Back

cosA = adjacent side / hypotenuse (b/c)

Front

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

Back

tanA = opposite side / adjacent side (a/b)

Front

How do you find the measure of an angle using sine?

Back

Use the equation: sinA = opposite/hypotenuse and solve for A.

Front

How do you find the measure of an angle using cosine?

Back

Use the equation: cosA = adjacent/hypotenuse and solve for A.

Front

How do you find the measure of an angle using tangent?

Back

Use the equation: tanA = opposite/adjacent and solve for A.

Front

What is the relationship between the sides of a right triangle and the angles?

Back

The angles determine the ratios of the sides (opposite, adjacent, hypotenuse).

Front

If the hypotenuse is 20 and the angle is 57°, how do you find the adjacent side?

Back

Use the equation: cos57° = adjacent/20.

Front

If the opposite side is 15 and the hypotenuse is 25, what is sinA?

Back

sinA = 15/25 = 0.6.

Front

What is the formula to find the length of the opposite side if you know the angle and hypotenuse?

Back

opposite = hypotenuse * sinA.