вычислите: tg435+tg375

tg (450-15) + tg (360+15) = tg15+tg15=tg30/2+tg30/2 = (sin30 / (1-cos30)) + (sin30 / (1-cos30)) = (0.5/1-sqrt (3) / 2) + (0.5/1-sqrt (3) / 2) = (1 / (2-sqrt (3))) + (1 / (2-sqrt (3))) = (2-sqrt (3) + 2-sqrt (3)) / 4-3=4-2sqrt (3)