Given : The number is .
To find: Set(s) of numbers in which belong to.
We know that,
So, is the product of a non zero rational number, i.e., 2 and an irrational number, i.e., .
We know that product of a non zero rational number and an irrational number is always irrational.
So, is an irrational number.
Therefore, the correct option is 5.
I do not know the answer of this question
Pi is irrational because it‘s an ongoing number that is infinite.