" 12."cot**(tan^(-)alpha+cot^(-1)a)

cot(tan^(-1)a+cot^(-1)a)

If cot^(-1) ( alpha) = cot^(-1)(2) + cot^(-1)(8) + cot^(-1)(18) + cot ^(-1)(32) + "…………" upto 100 terms , then alpha is :

If alpha in (-(pi)/(2), 0) , then find the value of tan^(-1) (cot alpha) - cot^(-1) (tan alpha)

If alpha in (-(pi)/(2), 0) , then find the value of tan^(-1) (cot alpha) - cot^(-1) (tan alpha)

If alpha in (-(pi)/(2), 0) , then find the value of tan^(-1) (cot alpha) - cot^(-1) (tan alpha)

If alpha in (-(pi)/(2), 0) , then find the value of tan^(-1) (cot alpha) - cot^(-1) (tan alpha)

If tan alpha + cot alpha=2 , then the value of tan^(13) alpha +cot^(13) alpha is

If tan alpha +cot alpha =a then the value of tan^(4) alpha +cot^(4) alpha=

If tan alpha + cot alpha=a , then the value of tan^(4)alpha + cot^(4)alpha is equal to