0 votes

\ \

The trigonometric equation is $\"image\"$ .

$\"image\"$

The function cos(x) has a period of 2π, first find all solutions in the interval [0, 2π).

The function cos(x) is positive in first , fourth quadrant.

In first Quadrant, 0 ≤ x ≤ π/2.

$\"image\"$

In fourth Quadrant, 3π/2 ≤ x ≤ 2π.

$\"image\"$ , $\"image\"$ and

$\"image\"$

So the solutions are

$\"image\"$ .

$\"image\"$

$\"image\"$ , and

$\"image\"$ .

The solutions are $\"image\"$ in the interval [0, 2π).