NCERT Exemplar Class 12
Example 4 Find the direction cosines of x, y and z-axis.
15
Nov
Example 4 Find the direction cosines of x, y and z-axis. Example 4 Find the direction cosines of x y- and z-axis November 15, 2021 Category: Chapter 11 - 3D Geometry , Maths , NCERT Exemplar Class 12 ,
Example 3 Find the direction cosines of the line passing through the two points (– 2, 4, – 5) and (1, 2, 3).
15
Nov
Example 3 Find the direction cosines of the line passing through the two points (– 2, 4, – 5) and (1, 2, 3). 2 3% 4 5) and (–1 Example 3 Find the direction cosines of the line passing through the two points (– 2 November 15, 2021 Category: Chapter 11 - 3D Geometry , [...]
Example 2 If a line has direction ratios 2, – 1, – 2, determine its direction cosines.
15
Nov
Example 2 If a line has direction ratios 2, – 1, – 2, determine its direction cosines. 1 2 determine its direction cosines. Example 2 If a line has direction ratios 2 November 15, 2021 Category: Chapter 11 - 3D Geometry , Maths , NCERT Exemplar Class 12 ,
Example 1 If a line makes angle 90°, 60° and 30° with the positive direction of x, y and z-axis respectively, find its direction cosines.
15
Nov
Example 1 If a line makes angle 90°, 60° and 30° with the positive direction of x, y and z-axis respectively, find its direction cosines. 60° and 30° with the positive direction of x Example 1 If a line makes angle 90° find its direction cosines. y and z-axis respectively November 15, 2021 Category: Chapter [...]
19. If θ is the angle between any two vectors a and b , then I a . b I = I a x b I when θ is equal to
15
Nov
19. If θ is the angle between any two vectors a and b , then I a . b I = I a x b I when θ is equal to 19. If θ is the angle between any two vectors a and b then I a . b I = I a x b [...]
18. The value of i(j x k) + j(i x k) + k(i x j) is
15
Nov
18. The value of i(j x k) + j(i x k) + k(i x j) is 18. The value of i(j x k) + j(i x k) + k(i x j) is November 15, 2021 Category: Chapter 10 - Vector Algebra , Maths , NCERT Exemplar Class 12 ,
17. Let a and b be two unit vectors and θ is the angle between them. Then a + b is a unit vector if
15
Nov
17. Let a and b be two unit vectors and θ is the angle between them. Then a + b is a unit vector if 17. Let a and b be two unit vectors and θ is the angle between them. Then a + b is a unit vector if November 15, 2021 Category: Chapter [...]
16. If θ is the angle between two vectors a and b , then a.b > 0 only when
15
Nov
16. If θ is the angle between two vectors a and b , then a.b > 0 only when 16. If θ is the angle between two vectors a and b then a.b > 0 only when November 15, 2021 Category: Chapter 10 - Vector Algebra , Maths , NCERT Exemplar Class 12 ,
11. Show that the direction cosines of a vector equally inclined to the axes OX, OY and OZ are 1/sqrt 3, 1/sqrt 3, 1/sqrt 3.
15
Nov
11. Show that the direction cosines of a vector equally inclined to the axes OX, OY and OZ are 1/sqrt 3, 1/sqrt 3, 1/sqrt 3. 1/sqrt 3 11. Show that the direction cosines of a vector equally inclined to the axes OX OY and OZ are 1/sqrt 3 November 15, 2021 Category: Chapter 10 - [...]
10. The two adjacent sides of a parallelogram are 2i – 4j + 5k and i – 2j – 3k. Find the unit vector parallel to its diagonal. Also, find its area.
15
Nov
10. The two adjacent sides of a parallelogram are 2i – 4j + 5k and i – 2j – 3k. Find the unit vector parallel to its diagonal. Also, find its area. 10. The two adjacent sides of a parallelogram are 2i - 4j + 5k and i - 2j - 3k. Find the unit [...]