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:

$\cos ^2(\frac{5\pi}{6})=1$

Using a calculator configurated in radians we get that:

$\cos ^2(\frac{5\pi}{6})=\frac{3}{4}$

As 1 ≠ 3/4, then x is not a solution.

Answer: x is not a solution.