[" i) "cot(tan^(-1)alpha+cot^(-1)alpha)" का मान हैं "],[[" (अ) "1," (ब) "oo," (स) "0," (द) इनमें से कोई नहीं "]]

if cot^(-1)alpha+cot^(-1)beta=cot^(-1)x then x

if cot^-1alpha+cot^-1beta=cot^-1x then x

If: cot^(-1)alpha + cot^(-1)beta = cot^(-1) x , then: x=

If cot^3alpha +cot ^2 alpha + cot alpha =1 then

(sin^(2)alpha)/(1+cot^(2) alpha) + (tan^(2)alpha)/((1+tan^(2) alpha)^(2)) + cos^(2) alpha =

If alpha in(-(3 pi)/(2),-pi), then the value of tan^(-1)(cot alpha)-cot^(-1)(tan alpha)+sin^(-1)(sin alpha)+cos^(-1)(cot alpha) is equal to (a)2 pi+alpha(b)pi+alpha(c)0(d)pi-alpha