Question 609073
tan(-x)csc x cos(-x)= -1


-tan(x)csc(x)cos(x)= -1


-tan(x)*(1/sin(x))*cos(x) = -1


-tan(x)*(cos(x)/sin(x)) = -1


-tan(x)*cot(x) = -1


-1 = -1


So this verifies the identity.

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