If the lines acosθ+bsinθ+(c/r)=0, bcosθ+csinθ+(a/r)=0 and ccosθ+asinθ+(b/r)=0 are concurrent then 

1.  a3+b3+c3+3abc

2.  a2+b2+c2

3.  a3+b3+c3=0

4.  a3+b3+c3=3abc

4

a3+b3+c3=3abc

Explanation :
No Explanation available for this question

The equation of the line at a distance of 4 units from pole and its normal is making an angle π/5 with the initial line is

1.  rcos(θ+π/5)=2

2.  rcos(θ+π/5)=4

3.  rcos(θ-π/5)=2

4.  rcos(θ-π/5)=4

4

rcos(θ-π/5)=4

Explanation :
No Explanation available for this question

The equation of the line passing through pole and which is parallel to rcos(θ-α)=P is

1.  θ=(π/4)+α

2.  θ=(π/3)+α

3.  θ=(π/2)-α

4.  θ=(π/2)+α

4

θ=(π/2)+α

Explanation :
No Explanation available for this question

The length of the normal from pole on the line rcos(θ-π/3)=5 is

1.  10

2.  5

3.  4

4.  3

4

5

Explanation :
No Explanation available for this question

The polar equation of the straight line with intercepts a and b on the rays θ=0 and θ=π/2 respectively is

1.  r(acosθ-bsinθ)=ab

2.  r(acosθ+bsinθ)=ab

3.  r(bcosθ-asinθ)=ab

4.  r(bcosθ+asinθ)=ab

4

r(bcosθ+asinθ)=ab

Explanation :
No Explanation available for this question

The lines a1cosθ+b1sinθ+(c1/r)=0, a1cosθ+b1sinθ+(c1/r) and a2cosθ+b2sinθ+(c2/r=0 are parall

1.  a1a2 –b1b2=0

2.  a1a2 +b1b2=0

3.  a1b2 +a2b1=0

4.  a1/a2 =b1/b2

4

a1/a2 =b1/b2

Explanation :
No Explanation available for this question

The line passing through (-1,π/2) and perpendicular to √3sinθ+2cosθ=4/r is

1.  5=2√3rsinθ-4rcosθ

2.  2=√3rcosθ+2rcosθ

3.  5=-2√3rsinθ-4rcosθ

4.  2=√3rcosθ-2rcosθ

4

2=√3rcosθ-2rcosθ

Explanation :
No Explanation available for this question

The polar equation of x2-y2=2ax is

1.  rsin2θ=2acosθ

2.  rcos2θ=2acosθ

3.  rcos2θ=asinθ

4.  rcos2θ=acosθ

4

rcos2θ=2acosθ

Explanation :
No Explanation available for this question

The lines acosθ+2sinθ+(1/r)=0, bcosθ+3sinθ+(1/r)=0 and ccosθ+4sinθ+(1/r)=0 are concurrent then a,b,c are in

1.  A.G.P

2.  H.P

3.  G.P

4.  A.P

4

A.P

Explanation :
No Explanation available for this question

1.  A.G.P

2.  H.P

3.  G.P

4.  A.P

4