Question

Determine if the given value of x is a solution to the given equation.5лcos?(x) = 1; x ==6

Answer 1

Equation:

`\cos ^2(x)=1`

To determine if the given value is a solution, we have to replace the given value of x in the equation as follows:

`\cos ^2((5\pi)/(6))=1`

Using a calculator configurated in radians we get that:

`\cos ^2((5\pi)/(6))=(3)/(4)`

As 1 ≠ 3/4, then x is not a solution.

Answer: x is not a solution.