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