Show that (cot(x) + cosec(x))² = (1 + cos(x))/(1 - cos(x)).

Описание: In this video, we derive and prove the trigonometric identity (cot(x) + cosec(x))² = (1 + cos(x))/(1 - cos(x)).

We start by recalling the definitions of cotangent and cosecant, then manipulate the left-hand side of the equation using algebraic and trigonometric identities to show that it is equal to the right-hand side.