Evaluate $\frac{\mathrm{cosec} \left(180°-A\right)}{\sec \left(180°+A\right)}·\frac{\cos \left(-A\right)}{\cos \left(90°+A\right)}$.

Trigonometry, Basic Trigonometry

For right-angled Triangle:
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Ranges of Trigonometric Functions:
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Identities and Formula:
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