`tan^-1a+tan^-1b,` where `a > 0, b>0, ab > 1`, is equal to

Ifa S tan1-b where 0

If y = (1 + tan A) (1 - tan B), where A -B=pi/4 then (y+ 1)^(y + 1) is equal to

The value of tan(sin^(-1)(cos(sin^(-1)x)))tan(cos^(-1)(sin(cos^(-1)x)))." where "x in (0, 1) is equal to

The value of tan(sin^(-1)(cos(sin^(-1)x)))tan(cos^(-1)(sin(cos^(-1)x))), where x in(0,1) is equal to 0(b)1(c)-1(d) none of these

The value of tan ^(-1) sqrt((a lambda)/(b c))+tan ^(-1) sqrt((b lambda)/(c a))+tan ^(-1) sqrt((c lambda)/(a b)) where a, b, c in R^(+) and lambda=a+b+c is equal to

if (1+tan alpha )(1+tan4 alpha ) =2 where alpha in (0 , pi/16 ) then alpha equal to

If tan A=1/2 and tan B=1/3 , then tan(A +B) is equal to

Ify = (1 + tan.4) (1-tan B), where AB = (pi) / (4) (y + 1) ^ (y + 1) i sequalt