$\"\"$

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The angle of depression is $\"\"$ .

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From the trigonometric table: $\"\"$ .

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Observe the figure:

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The adjacent side to $\"\"$ is $\"\"$ .

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The opposite side to $\"\"$ is $\"\"$ .

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

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Substitute all the above values in $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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The value of $\"\"$ is $\"\"$ .

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$\"\"$

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The value of $\"\"$ is $\"\"$ .