\(sin2\alpha=2sin\alpha\cdot{cos\alpha}\) \(sin2\alpha=sin\alpha\cdot{cos\alpha}\) \(cos2\alpha=cos^2\alpha-sin^2\alpha\) \(cos2\alpha=1-2sin^2\alpha\) \(cos2\alpha=2cos^2\alpha-1\) \(tg2\alpha=\frac{2tg\alpha}{1-tg^2\alpha}\)

Задание

Выберите верные утверждения.

\(sin2\alpha=2sin\alpha\cdot{cos\alpha}\)
\(sin2\alpha=sin\alpha\cdot{cos\alpha}\)
\(cos2\alpha=cos^2\alpha-sin^2\alpha\)
\(cos2\alpha=1-2sin^2\alpha\)
\(cos2\alpha=2cos^2\alpha-1\)
\(tg2\alpha=\frac{2tg\alpha}{1-tg^2\alpha}\)