The square root of: is:
A square root of a number is a value such that when it is multiplied to itself then it gives us the original number.
Here the number is:
On taking the square root of this number:
Also, we may check it by it's definition
i.e. the square root of the given number is:
Answer: r = 4 sec θ
Explanation: Using: x = r cos θ then r cos θ = 4 ⇒ r = 4 cos θ = 4 sec θ