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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