Sine, Cosine, and Tangent

Sine

100

Angle C: Opposite = 16 Adjacent = 30 Hypotenuse = 34 Sine (C) =

8/17

200

Angle A: Opposite = 30 Adjacent = 16 Hypotenuse = 34 Sine A = ?

15/17

300

Angle A: Opposite = 12 Adjacent = 9 Hypotenuse = 15

4/5

500

How do you find the sine of an angle?

opposite/hypotenuse

Cosine

100

What should you always do to fractions?

Reduce them!

200

Angle A: Opposite = 40 Adjacent = 30 Hypotenuse = 50 Cosine (A) =

3/5

300

Angle A: Opposite = 14 Adjacent = 48 Hypotenuse = 50

24/25

500

How do you find cosine?

adjacent/hypotenuse

Tangent

100

Angle A Opposite = 48 Adjacent = 14 Hypotenuse = 50

24/7

200

What two values do you use to find tangent?

opposite and adjacent

300

Which value do you leave out when finding tangent?

hypotenuse

400

The sides of a triangle are 30, 40 and 50. Which side would you NOT use when finding tangent? Why?

50, it's the hypotenuse

500

How do you find tangent?

opposite/hypotenuse

Vocabulary

100

Spell and say the word that means across from an angle

OPPOSITE

300

Spell and say the word that means the side that is touching or next to an angle.

ADJACENT

400

Spell and say the type of triangle that has 1 90 degree angle.

Right

500

Spell and say the word that means the longest side in a right triangle.

Hypotenuse