Trigonometric Ratios Review

(a)   - the study of measuring all sides and angles of a triangle

How many trigonometric ratios are there?

• 1

• 2

• 3

• 4

• 5

Angles are labeled using _____ letters

• Capital

• Lowercase

• Greek

• Cursive

sine - the ratio of the leg (a)   of the angle to the hypotenuse

cosine - the ratio of the leg (a)   of the angle to the hypotenuse

(a)   - the ratio of the leg opposite the angle to the leg adjacent to the angle

_____ side of a triangle - the side of the triangle that does not touch the indicated angle

• opposite

• adjacent

• hypotenuse

• sine

• cosine

_____ side of a triangle - the side of the triangle that touches the indicated angle

• opposite

• adjacent

• hypotenuse

• sine

• cosine

_____ side of a triangle - the side of the triangle that is always across/diagonal from the right angle

• opposite

• adjacent

• hypotenuse

• sine

• cosine

What is the formula for calculating sine?