Trig Functions Flashcard 1

Front

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

Back

The sine of an angle 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

The cosine of an angle 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

The tangent of an angle is the ratio of the length of the opposite side to the length of the adjacent side.

Front

What is the Pythagorean theorem?

Back

Front

Identify the hypotenuse in a right triangle with sides labeled a, b, and c.

Back

The hypotenuse is the longest side of the triangle, opposite the right angle, typically labeled as side c.

Front

If angle B = 24 degrees and side a = 8, how do you find side c?

Back

Front

Calculate sin B if the opposite side is 8 and the hypotenuse is 17.

Back

Front

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

Back

The lengths of the sides are proportional to the sine, cosine, and tangent of the angles.

Front

How do you determine which trigonometric function to use to solve for a side?

Back

Use sine for opposite/hypotenuse, cosine for adjacent/hypotenuse, and tangent for opposite/adjacent.

Front

Back