Trigonometry

TRIGONOMETRY

SIMPLE

CONCEPT

hipothenus

oppositex sin

hipothenus

adjecentx cos

adjecent

oppositex tan

x

hipothenus

adjecent

opposite

x

a

b

c

hipothenus

oppositex sin

hipothenus

adjecentx cos

adjecent

oppositex tan

xx

cos

1sec

xecx

sin

1cos

xx

tan

1cot

x

34

5

Find the value of

a) Sec x

b) Cosec x

c) Cot x

2 2

1 1

30

60

Base on the triangle above find values of

a) Sin 30 g) cot 30

b) Cos 30 h) sec 30

c) Tan 30 i) cosex 30

d) Sin 60 j) sec 60

e) Cos 60 k) cosec 60

f) Tan 60 l) cot 60

45

45

1

1

Base on triangle above find value of

a) Sin 45 d) sec 45

b) Cos 45 e) cosex 45

c) Tan 45 f) cot 45

Quadrant

Quadrant 1Quadrant 2

Quadrant 3 Quadrant 4

0

90

180

270

360

Q1 Q2 Q3 Q4

R1 0-90 90-180 180-270 270-360

R2 360-470

R3

R4

R5

THE ANGLE BASE ON QUADRANT

450

45

4545

Equivalent angle in the quadrant

4545

45 45

Value of sin,cos and tan base on Quadrant

Q1 Q2 Q3 Q4

All + Sin + Tan + Cos +

Sin x

Cos x

Tan X