Find the value of `(cot9^0-1)(cot18^0-1)(cot27^0-1)(cot36^0-1)`

Find the value of : cot(tan^-1a+cot^-1a)

Find the value of cot(tan^(-1)a+cot^(-1)a)

Find the value of cot(tan^(-1)a+cot^(-1)a)

Find the value of: cot(tan^(-1)a+cot^(-1)a)

Find the value of: cot(tan^(-1)a+cot^(-1)a)

Find the value of sin((1)/(2) cot^(-1) (0))

Find the value of cot(tan^(-1) a + cot^(-1) a)

Find the value of (cot25^0+cot55^0)/(tan25^0+tan55^0)+(cot55^0+cot100^0)/(tan55^0+tan100^0)+(cot100^0+cot25^0)/(tan100^0+tan25^0)

Find the value of (cot25^0+cot55^0)/(tan25^0+tan55^0)+(cot55^0+cot100^0)/(tan55^0+tan100^0)+(cot100^0+cot25^0)/(tan100^0+tan25^0)

Find the value of (cot25^0+cot55^0)/(tan25^0+tan55^0)+(cot55^0+cot100^0)/(tan55^0+tan100^0)+(cot100^0+cot25^0)/(tan100^0+tan25^0)