Question

Найдите sint, cost, tgt, ctgt если t= 13/6π зариние огромное

Answer 1

$sin \frac{13 \pi }{6} =sin(2 \pi + \frac{ \pi }{6} ) = sin \frac{ \pi }{6} = \frac{1}{2} \\ cos \frac{13 \pi }{6} =cos(2 \pi + \frac{ \pi }{6} ) =cos \frac{ \pi }{6} = \frac{ \sqrt{3} }{2} \\ tg \frac{13 \pi }{6} =tg(2 \pi + \frac{ \pi }{6} ) = tg \frac{ \pi }{6} = \frac{ \sqrt{3} }{3} \\ ctg \frac{13 \pi }{6} =ctg(2 \pi + \frac{ \pi }{6} ) = ctg \frac{ \pi }{6} = \sqrt{3} \\$