Learn to verify an identity using double angle formulas

The video tutorial focuses on solving trigonometric problems using the double angle formula. The teacher begins by explaining the strategy of working on the right side of the equation. The process involves rewriting expressions to simplify fractions, using the double angle formula, and breaking down terms. The tutorial concludes with a discussion on the challenges of the problems presented.

What does the speaker mean by 'this is a monomial' in the context of the expression?

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Why does the speaker consider the first two problems to be difficult?

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