co-orinate geometry by moahan pudasaini
Post on 04-Jul-2015
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Equation of Straight line in Normal Form Present By Mohan PUdasaini At Hetauda, Nepal. it helps to Secondary Mathematics Students.....
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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
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