Выберите верные равенства. \(\sin^2\alpha+\cos^2\alpha=1\) \(\sin^2\alpha-\cos^2\alpha=1\) \(1+\tg^2\alpha=\frac{1}{\cos^2\alpha}\) \(1+\ctg^2\alpha=\frac{1}{\cos^2\alpha}\) \(1+\ctg^2\alpha=\frac{1}{\sin^2\alpha}\) \(1+\tg^2\alpha=\frac{1}{\sin^2\alpha}\)

Задание

Выберите верные равенства.

\(\sin^2\alpha+\cos^2\alpha=1\)
\(\sin^2\alpha-\cos^2\alpha=1\)
\(1+\tg^2\alpha=\frac{1}{\cos^2\alpha}\)
\(1+\ctg^2\alpha=\frac{1}{\cos^2\alpha}\)
\(1+\ctg^2\alpha=\frac{1}{\sin^2\alpha}\)
\(1+\tg^2\alpha=\frac{1}{\sin^2\alpha}\)