1.  0

2.  1

3.  2

4.  1/2

4

1/2

Explanation :
No Explanation available for this question

# If α and β are the eccentric angles of the extrimities of a focal chord of an ellipse of eccentricity e, then cos α-β/2=

1.  e cos α-β/2

2.  e cos α+β/2

3.  e cos α+β/3

4.  e cos 2α+2β/2

4

e cos α+β/2

Explanation :
No Explanation available for this question

# The equation of the normal at a point hose eccentric angle is 3π/2+θ to the ellipse x2/9+y2/4=1 is

1.  3x/sin θ+2y/cos θ=5

2.  3x/sin θ-2y/cos θ=5

3.  2x/sin θ+3y/cos θ=5

4.  2x/sin θ-3y/cos θ=5

4

3x/sin θ-2y/cos θ=5

Explanation :
No Explanation available for this question

# A vertical tower stands on a declivity which is included at 150 to the horizon. From the foot of the tower a man ascends the declivity for 80 feet and then finds that the tower subtends an angle of 300. The

1.  20 (√6 - √2)

2.  40 (√6 - √2)

3.  40 (√6 + √2)

4.  none

4

40 (√6 - √2)

Explanation :
No Explanation available for this question

# The angle of elevation of the summit of a mountain at a point A is 450. After walking 200 mt from A towards the mountain along a road included at 150, it is observed that the angle of elevation of the summit

1.  100 (√6 +√2) mt

2.  100 (√6 -√2) mt

3.  100/√6 mt

4.  100/√2 mt

4

100 (√6 +√2) mt

Explanation :
No Explanation available for this question

# If 2α, 2β are the eccentric angles of the extremities of a focal chord of an ellipse of eccentricity e then cos α-β

1.  e sin (α+β)

2.  sin (α+β)/e

3.  e cos (α+β)

4.  (1/e)cos (α+β)

4

e cos (α+β)

Explanation :
No Explanation available for this question

1.  2a

2.

3.

4.

4

Explanation :
No Explanation available for this question

# If α and β  are the eccentric angles of the ends of a focal chord of the ellipse x2/a2+y2/b2=1 then cos2(α+β/2)sec2(α-β/2)=

1.  a2+b2/a2

2.  a2-b2/a2

3.  a2/a2+b2

4.  a2/a2-b2

4

a2/a2-b2

Explanation :
No Explanation available for this question

# I: If flag staff of 6 mt high placed on the top of a tower a shadow of 2√3 mt along the ground then the angle that the sun makes with the ground is 600.

1.  only I is true

2.  only II is true

3.  both I and II are true

4.  neither I and II true

4

both I and II are true

Explanation :
No Explanation available for this question

1.  a2x2-b2y2=c4

2.  a2x2+b2y2=c4

3.  a2x2+b2y2=c2

4.  b2x2+a2y2=c4

4