Question

Cos square a minus 1 into cot square a + 1 is equal to -1 prove it

Answer 1

Step-by-step explanation:

(Cos²a - 1)*(Cot²a + 1)

(Cos²a - 1) * Cosec²a

(Cos²a - 1)/Sin²a

(Cos²a - 1)/1-Cos²a

-(1-Cos²a)/(1-Cos²a)

-1