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The trigonometric equation is $\"\"$ , on the interval $\"\"$ .

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$\"\"$

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Add $\"\"$ on each side.

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$\"\"$

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Divide each side by $\"\"$ .

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$\"\"$

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$\"\"$ .

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The general solution of $\"\"$ is $\"\"$ , where $\"\"$ is an integer.

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$\"\"$

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The general solution is $\"\"$ .

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If $\"\"$ then $\"\"$ .

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If $\"\"$ then $\"\"$ .

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If $\"\"$ then $\"\"$ .

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If $\"\"$ then $\"\"$

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The solution on the $\"\"$ is $\"\"$ .

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$\"\"$ .