The sqrt(x) function accepts only one value as its parameter.

x

A calculation which resolves to a <number> greater than or equal to 0.

Returns a <number> which is the square root of x.

• if x is +∞, the result is +∞.
• If x is 0⁻, the result is 0⁻.
• If x is less than 0, the result is NaN.

<sqrt()> = 
  sqrt( <calc-sum> )  

<calc-sum> = 
  <calc-product> [ [ '+' | '-' ] <calc-product> ]*  

<calc-product> = 
  <calc-value> [ [ '*' | '/' ] <calc-value> ]*  

<calc-value> = 
  <number>         |
  <dimension>      |
  <percentage>     |
  <calc-constant>  |
  ( <calc-sum> )   

<calc-constant> = 
  e          |
  pi         |
  infinity   |
  -infinity  |
  NaN        

• pow()
• hypot()
• log()
• exp()