Question 1112038
{{{(1+cotx)^2+(1-cotx)^2=2cosec^2x}}}


{{{(1+cotx)^2+(1-cotx)^2}}}

Identity
{{{cot^2(x) + 1 = cosec^2(x)}}}

{{{(1+2cotx+cot^2(x))+(1-2cotx+cot^2(x))}}}


{{{(1+cot^2(x))+(1+cot^2(x))}}}

{{{2cosec^2(x)}}}