Выполни задание

Выбери верные равенства.

• \(\sin^2 70\degree + \cos^2 20\degree = 1\) .
• \(\tg 24\degree \tg 56\degree = 1\) .
• \(\sin 60\degree = 2\sin 30\degree\) .
• \(\tg 60\degree = 3\tg 30\degree\) .
• \(\ctg 41\degree \ctg 49\degree = 1\) .
• \(\sin^2 40\degree + \sin^2 50\degree = 1\) .
• \(\tg 37\degree = \tg 53\degree\) .
• \(\sin 75\degree = \cos 15\degree\) .