Question

( begin{aligned} operatorname{sel}^{2} frac{sqrt{a+6}}{a-6} &+sqrt{frac{a-b}{a+6}}=frac{(a+b)+(a-b)}{sqrt{a-b} sqrt{a+b}} &=frac{2 a}{sqrt{a^{2}-b^{2}}}=frac{2 frac{a}{b}}{sqrt{frac{a^{2}}{b^{2}}-1}} &=frac{2 cot x}{sqrt{cot ^{2} x-1}} end{aligned} )

# a' + b a + b 19. If tan x lab , then find the value of," Va-b Va+b [NCE 2 72

Solution