Simplifying a perfect square trigonometric trinomial

The video tutorial focuses on simplifying a trigonometric identity involving cotangent. It begins by introducing the concept of simplifying trigonometric identities and then moves on to factor a trinomial expression. The instructor explains the process of factoring by using a simpler algebraic expression and then applies trigonometric identities, specifically the Pythagorean identities, to simplify the expression further. The final result is expressed in terms of cosecant, demonstrating the transformation from cotangent to cosecant through algebraic manipulation and trigonometric identities.

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