The trigonometric equation is .

Pythagorean identity : .

Apply zero product property.

Solve .

The general solution of is , where is an integer.

The solution is , where is an integer.

Find the solutions on the interval .

If , .

If , .

If , .

If , .

Thus, the solution is on the interval .

Solve .

The general solution of is , where is an integer.

The solution is , where is an integer.

Find the solutions on the interval .

If , .

If , .

Thus, the solution is on the interval .

Solve .

The general solution of is , where is an integer.

The solution is , where is an integer.

Find the solutions on the interval .

If , .

If , .

If , .

If , .

Thus, the solutions are and on the interval .

Solve .

The general solution of is , where is an integer.

The solution is , where is an integer.

Now find the solutions on the interval .

If , .

If , .

Thus, the solutions are and on the interval .

The solutions of are , ,  , , , and on the interval .