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lim x->0 [sin-1(x-2).(tan (x-2) )/[(x-2)2 ]

I got the answer 1.Is it correct? I would be glad if I could have a detailed solution.

how do we prove that tan^-1(x) + cot^-1(x) = pi/4 ?

2:4=:2

(3 4 6) (2 1 -1) (-1 3 5) determine the matrix

I am looking for a tutor to assist me in adding like terms for my Algebra class