Question

корень из 48 * ctg 5п/4 * sin 7п/3

Answer 1

$\sqrt{48}* ctg \frac{5 \pi }{4} *sin \frac{7 \pi }{3} =4 \sqrt{3} *ctg( \pi +\frac{\pi }{4} )*sin(2 \pi - \frac{ \pi }{3} )=\\ =4 \sqrt{3} *ctg\frac{\pi }{4}*sin( - \frac{ \pi }{3} )=-4 \sqrt{3} *1* \frac{ \sqrt{3} }{2} =-6.$