What are the values of \( \cos A-\sin A \) and \( \tan A+\cot A \) when \( A \) has the values \...

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What are the values of \( \cos A-\sin A \) and \( \tan A+\cot A \) when \( A \) has the values
\[
\frac{7 \pi}{4}
\]
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