Opener

The Trigonometric Functions we will be

looking at

SINE

COSINE

TANGENT

The Trigonometric Functions

SINE

COSINE

TANGENT

SINE

Pronounced “sign”

Pronounced “co-sign”

COSINE

Pronounced “tan-gent”

TANGENT

Pronounced

“theta”

Greek Letter q

Represents an unknown angle

oppositehypotenuse

LegOppSin

Hyp

adjacent tan

Opp LegAdj Leg

hypotenuseopposite

adjacent

LegAdjCos

Hyp

Finding sin, cos, and tan.

Just writing a ratio.

Find the sine, the cosine, and the tangent of theta.

Give a fraction.

sinopphyp

3537

cosadjhyp

1237

tanoppadj

3512

35

12

37

Shrink yourself down and stand where the angle is.Now, figure out your ratios.

Find the sine, the cosine, and the tangent of theta

24.5

23.1

8.2

8.224.5

23.124.5

8.223.1

Shrink yourself down and stand where the angle is.Now, figure out your ratios.

sinopphyp

cosadjhyp

tanoppadj

ClassworkSPW 16.4

Draw ABC where BAC = 90 and sin B = 3/5

1.What is the length of

AB?

2.What is tan C?

4

4/3

Draw stick-man standing where the angle is and mark each given side. Then tell which trig ratio you have.

O H

sin

HomeworkWorksheet