" 53.If "int_(0)^(1)cot^(-1)(1-x+x^(2))dx=lambda int_(0)^(1)tan^(-1)xdx" then "'lambda'" is equal to "

If int_(0)^(1)cot^(-1)(1-x+x^(2))dx=lamdaint_(0)^(1)tan^(-1)xdx then 'lamda' is equal to

int_(0)^(1)tan^(-1)(1-x+x^(2))dx=

int_(0)^(1)tan^(-1)(1-x+x^(2))dx

If int_(0)^(1) cot^(-1)(1-x-x^(2))dx=k int_(0)^(1) tan^(-1)x dx , then k=

If int_(0)^(1) cot^(-1)(1-x+x^(2))dx=k int_(0)^(1) tan^(-1)x dx , then k=

int_(0)^(1)x tan^(-1)xdx=

int_(0)^(x)tan^(-1)(1-x+x^(2))dx

If int_(0)^(1)cot^(-1)(1-x+x^(2))dx=lambda int_(0)^(1)tan^(-1)xdx, then lambda is equal to 1( b) 2(c)3(d)4

int_(0)^(1)(cot^(-1)x)/(1+x^(2))dx

int_(0)^(1)x^(2)tan^(-1)xdx