Impara online a risolvere i problemi di passo dopo passo. (csc(x)-1)(csc(x)+1)=-cot(x)^2. Applicare la formula: \left(a+b\right)\left(a+c\right)=a^2-b^2, dove a=\csc\left(x\right), b=1, c=-1, a+c=\csc\left(x\right)+1 e a+b=\csc\left(x\right)-1. Applying the trigonometric identity: \csc\left(\theta \right)^2-1 = \cot\left(\theta \right)^2. Applicare la formula: a=b\to a-b=0, dove a=\cot\left(x\right)^2 e b=-\cot\left(x\right)^2. Applicare la formula: ab=ab, dove ab=- -\cot\left(x\right)^2, a=-1 e b=-1.

(csc(x)-1)(csc(x)+1)=-cot(x)^2