If and then is equal to
Explanation for the correct option.
Find the value of satisfying the equation.
It is given that , so its magnitude is given as: .
Now, it is known that the square of any real number is non-negative. As, so
Now, add both sides.
Now, take square root of both sides.
So on comparing it with , it is seen that is equal to .
Hence, the correct option is B.