wartosc odwrotna tg od ctg

[jessicala]

\(\displaystyle{ \ctg \left( \tg ^{-1} \frac{x}{ \sqrt{2} } \right)}\)

doszlam do tego momentu:
\(\displaystyle{ \tg \alpha \frac{x}{ \sqrt{2} } \\
\tg \alpha \frac{x \sqrt{2} }{2}}\)
i niestety nie wiem do dalej?

[bartek118]

\(\displaystyle{ \ctg \left( \tg ^{-1} \frac{x}{ \sqrt{2} } \right) = \frac{1}{\tg \left( \tg ^{-1} \frac{x}{ \sqrt{2} } \right)}}\)