Download - Co-orinate Geometry by Moahan Pudasaini
Transcript
COORDINATE GEOMETRY
Class :9
Mr. Mohan Pudasaini
Y
X’O X
Y
’
B
M
A
p
Mr. Mohan Pudasaini
Y
X’O X
Y
’
B
M
A
p
Then, APN=
Angle made in X-axis =
P(x,y
)
Let P(x,y) be any point on the line AB
Draw a perpendicular from P to OA
N
Mr. Mohan Pudasaini
Y
X’O X
Y
’
B
M
A
p
P(x,y
)
Now, In triangle PNATan =
NA= y Tan
N
=And In triangle OMA
Cos
Cos =
Cos =
Mr. Mohan Pudasaini
Find the equation of the line if p=4 and =1350
Equation of the line is
xcos +ysin =p
Or, xcos1350+ysin1350=4
Or,x(- )+y( )=4
X-y+4 =0
Mr. Mohan Pudasaini