Arts (English Medium) कक्षा १२ - CBSE Question Bank Solutions for Mathematics

Give an example of a relation which is reflexive and symmetric but not transitive?

Evaluate the following:

`sec^-1(sec  (13pi)/4)`

Give an example of a relation which is reflexive and transitive but not symmetric?

Evaluate the following:

`sec^-1(sec  (25pi)/6)`

Give an example of a relation which is symmetric and transitive but not reflexive?

Give an example of a relation which is symmetric but neither reflexive nor transitive?

Give an example of a relation which is transitive but neither reflexive nor symmetric?

Given the relation R = {(1, 2), (2, 3)} on the set A = {1, 2, 3}, add a minimum number of ordered pairs so that the enlarged relation is symmeteric, transitive and reflexive.

Let A = {1, 2, 3} and R = {(1, 2), (1, 1), (2, 3)} be a relation on A. What minimum number of ordered pairs may be added to R so that it may become a transitive relation on A.

Let A = {a, b, c} and the relation R be defined on A as follows: R = {(a, a), (b, c), (a, b)}. Then, write minimum number of ordered pairs to be added in R to make it reflexive and transitive.

Defines a relation on N :
  x > y, x, y ∈  N

Determine the above relation is reflexive, symmetric and transitive.

Evaluate the following:

`\text(cosec)^-1(\text{cosec}  pi/4)`

Evaluate the following:

`cosec^-1(cosec  (3pi)/4)`

Evaluate the following:

`cosec^-1(cosec  (6pi)/5)`

Defines a relation on N :

x + y = 10, x, y∈ N

Determine the above relation is reflexive, symmetric and transitive.

Evaluate the following:

`cosec^-1(cosec  (11pi)/6)`

Defines a relation on N:

xy is square of an integer, x, y ∈ N

Determine the above relation is reflexive, symmetric and transitive.

Evaluate the following:

`cosec^-1(cosec  (13pi)/6)`

Defines a relation on N:

x + 4y = 10, x, y ∈ N

Determine the above relation is reflexive, symmetric and transitive.

Evaluate the following:

`cosec^-1{cosec  (-(9pi)/4)}`