Learn how to simplify a rational trigonometric expression

The video tutorial focuses on simplifying trigonometric expressions by rewriting them in terms of sines and cosines. The instructor demonstrates how to break down complex expressions into simpler forms using trigonometric identities. By dividing and canceling terms, the expression is simplified to the sine of alpha. The tutorial emphasizes the importance of understanding trigonometric identities and their application in simplifying expressions.

Explain the process of multiplying by the reciprocal to eliminate fractions in the context of the text.

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What is the final simplified form of the expression mentioned in the text?

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