Question

Integral(1/a2+x2)dx
(a)-1/a tan-1x/a +c (b)1/a tan-
1 x/a +c (c)1/X2+a2 tan-1x/a
(d)none of these
to​

Answer 1

Answer:

answer is b because

$intergral \: of \: 1 \div ( {a}^{2} + {b}^{2} ) = 1 \div a( { \tan(x \div a) }^{ - 1 } )$