NCERT Solutions For Class 11 Maths Chapter 11: Conic Sections

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NCERT Solutions for Class 11 Maths Chapter 11 Conic Sections are provided in the article. Conic section is a curve formed by intersecting a plane with a cone. The curves that are formed are CirclesEllipseParabola, and Hyperbola.

Download: NCERT Solutions for Class 11 Mathematics Chapter 11 pdf


Class 11 Maths NCERT Solutions Chapter 11 Conic Sectios

Class 11 Maths NCERT Solutions Chapter 11 Conic Sections are provided below:

Also read: Concept Notes on Conic Sections 


Important Topics: Class 11 Maths NCERT Solutions Chapter 11 Conic Sections

Important Topics Class 11 Maths NCERT Solutions Chapter 11 Conic Sections are elaborated below:

  • Sections of a Cone

There are three sections of a cone or conic sections: Parabola, Hyperbola, and Ellipse (Circle is a special kind of Ellipse).

  • Circle

Circle is the simplest conic section. As a conic section, circle is intersection of a plane perpendicular to the cone's axis

Please Note: 

Value of eccentricity(e) for a circle is e = 0.

Circle has no directrix.

General form of the equation of a circle with center at (h, k), and radius r: (x−h)2 + (y−k)2 = r2

  • Parabola

When intersecting plane is at an angle to the surface of the cone, thwe obtained conic section is called the parabola. It is a U-shaped conic section.

The value of eccentricity(e) for parabola is e = 1 

  • Ellipse

Ellipse is a conic section that is formed when plane intersects with cone at an angle. Ellipse has 2 foci, a major axis, as well as a minor axis.

Please Note:

  • Value of eccentricity(e) for ellipse is e < 1.
  • Ellipse has 2 directrices.
  • The conic section formula for an ellipse is: (x−h)2/a2 + (y−k)2/b2 = 1
  • Hyperbola

Hyperbola is formed when interesting plane is parallel to axis of the cone, and intersect with both nappes of the double cone. 

General form of equation of hyperbola with (h, k) as the center is:

(x−h)2/a2 - (y−k)2/b2 = 1

NCERT Solutions For Class 11 Maths Chapter 11 Exercises:

The detailed solutions for all the NCERT Solutions for Chapter 11 Conic Sections under different exercises are as follows:

Also check:

Also check:

CBSE CLASS XII Related Questions

1.

Evaluate \(\begin{vmatrix} cos\alpha cos\beta &cos\alpha sin\beta  &-sin\alpha \\   -sin\beta&cos\beta  &0 \\   sin\alpha cos\beta&sin\alpha\sin\beta  &cos\alpha  \end{vmatrix}\)

      2.
      If A'= \(\begin{bmatrix} 3 & 4 \\ -1 & 2 \\ 0 &1 \end{bmatrix}\)\(\begin{bmatrix}  -1 & 2 & 1 \\ 1 &2 & 3\end{bmatrix}\) , then verify that 
      (i) \((A+B)'=A'+B' \)
      (ii) \((A-B)'=A'-B'\)

          3.
          Find the inverse of each of the matrices, if it exists. \(\begin{bmatrix} 1 &  3\\ 2 & 7\end{bmatrix}\)

              4.
              Let f: R→R be defined as f(x) = 3x. Choose the correct answer.

                • f is one-one onto
                • f is many-one onto
                • f is one-one but not onto
                • f is neither one-one nor onto

                5.

                Let A=\(\begin{bmatrix} 0 & 1 \\ 0 & 0 \end{bmatrix}\),show that(aI+bA)n=anI+nan-1bA,where I is the identity matrix of order 2 and n∈N

                    6.
                    Find the vector and the cartesian equations of the lines that pass through the origin and(5,-2,3).

                        CBSE CLASS XII Previous Year Papers

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