Trig Ratios Basics Review

Front

What is the definition of Cosine (Cos)?

Back

Cosine (Cos) is the ratio of the length of the adjacent side to the length of the hypotenuse in a right triangle.

Tags

CCSS.HSG.SRT.C.6

Front

What is the definition of Sine (Sin)?

Back

Sine (Sin) is the ratio of the length of the opposite side to the length of the hypotenuse in a right triangle.

Tags

CCSS.HSG.SRT.C.6

Front

What is the ratio for Cosine?

Back

Adjacent/Hypotenuse (Adj/Hyp)

Tags

CCSS.HSG.SRT.C.6

Front

What is the ratio for Sine?

Back

Opposite/Hypotenuse (Opp/Hyp)

Tags

CCSS.HSG.SRT.C.6

Front

Calculate Cos D if the adjacent side is 6 and the hypotenuse is 10.

Back

Cos D = 6/10 = 3/5.

Tags

CCSS.HSG.SRT.C.6

Front

Calculate Cos X if the adjacent side is 15 and the hypotenuse is 17.

Back

Cos X = 15/17.

Tags

CCSS.HSG.SRT.C.6

Front

Calculate Sin A if the opposite side is 21 and the hypotenuse is 29.

Back

Sin A = 21/29.

Tags

CCSS.HSG.SRT.C.6

Front

Calculate Sin Θ if the opposite side is 4 and the hypotenuse is 5.

Back

Sin Θ = 4/5.

Tags

CCSS.HSG.SRT.C.6

Front

What is the relationship between Sine and Cosine in a right triangle?

Back

Sine and Cosine are complementary; Sin(θ) = Cos(90° - θ).

Tags

CCSS.HSG.SRT.C.7

Front

What is the Pythagorean identity involving Sine and Cosine?

Back

Sin²(θ) + Cos²(θ) = 1.

Tags

CCSS.HSF.TF.C.8