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Applying the trigonometric identity: $\cot\left(\theta \right)^2 = \csc\left(\theta \right)^2-1$
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$\csc\left(x\right)^2+4-2\csc\left(x\right)^2=0$
Learn how to solve differential calculus problems step by step online. Prove that cot(x)^2-2csc(x)^2+5=0 is not an identity. Applying the trigonometric identity: \cot\left(\theta \right)^2 = \csc\left(\theta \right)^2-1. Combining like terms \csc\left(x\right)^2 and -2\csc\left(x\right)^2. There is no identity or mathematical rule that allows us to proceed trying to match both sides of the equality, so we conclude that it is not true.