Question

Let x be an irrational number. Which of the following statement(s) need not be always correct?
(A) tan x is irrational.
(B) sin x is irrational.
(C)
$1div (1 + pi x )$
is irrational.
(D)
$\sqrt{ |x| }$
is irrational.
​

Answer 1

Answer:

The square root of 2, or the one-half power of 2, written in mathematics as {\displaystyle {\sqrt {2}}}{\sqrt {2}} or {\displaystyle 2^{1/2}}2^{{1/2}}, is the positive algebraic number that, when multiplied by itself, equals the number 2.[1] Technically, it must be called the principal square root of 2, to distinguish it from the negative number with the same property.

The square root of 2 is equal to the length of th