Question

sin(7pi/4) *cos(5pi/3) *tg(7pi/6)*ctg(4pi/3)

Answer 1

$sin(7pi/4)cos(5pi/3)tg(7pi/6)ctg(4pi/3)=-frac{sqrt{2}}{2}cdot0.5cdotfrac{sqrt{3}}{3}cdotfrac{sqrt{3}}{3}=-frac{sqrt{2}}{12}$