Question

Докажите тождество sin²t/1-sin²t=tg²t

Answer 1

Ответ:

$\frac{ \sin {}^{2} (t) }{1 - \sin {}^{2} (t) } = \frac{ \sin {}^{2} (t) }{ \cos {}^{2} (t) } = tg {}^{2}( t)$