$\"\"$

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The trigonometric equation is $\"\"$ .

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$\"\"$

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Subtract $\"\"$ from each side.

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$\"\"$

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Divide each side by $\"\"$ .

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$\"\"$

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$\"\"$ and $\"\"$ .

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$\"\"$

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First solve $\"\"$ .

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$\"\"$ and $\"\"$ .

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$\"\"$ and $\"\"$ .

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

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The solutions are $\"\"$ or $\"\"$ , where $\"image\"$ is an integer. $\"\"$

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Now solve $\"\"$ .

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$\"\"$ and $\"\"$ .

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$\"\"$ and $\"\"$ .

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The solutions are $\"\"$ or $\"\"$ , where $\"image\"$ is an integer.

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$\"\"$

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The solutions are $\"\"$ , $\"\"$ , $\"\"$ and $\"\"$ , where $\"image\"$ is an integer.