Аналогично предыдущим задачам AB = 39, BC = 15, < С = 90 гр. AB - гипотенуза, BC - катет. Второй катет AC^2 = AB^2 - BC^2 = 39^2 - 15^2 = 1521 - 225 = 1296 = 36^2 AC = 36 sin A = BC/AB = 15/39 = 5/13 cos A = AC/AB = 36/39 = 12/13 tg A = BC/AC = 15/36 = 5/12 ctg A = 1/tg A = 12/5 sin B = AC/AB = 36/39 = 12/13 cos B = BC/AB = 15/39 = 5/13 tg B = AC/BC = 36/15 = 12/5 ctg B = 1/tg B = 5/12
AB = 39, BC = 15, < С = 90 гр.
AB - гипотенуза, BC - катет. Второй катет
AC^2 = AB^2 - BC^2 = 39^2 - 15^2 = 1521 - 225 = 1296 = 36^2
AC = 36
sin A = BC/AB = 15/39 = 5/13
cos A = AC/AB = 36/39 = 12/13
tg A = BC/AC = 15/36 = 5/12
ctg A = 1/tg A = 12/5
sin B = AC/AB = 36/39 = 12/13
cos B = BC/AB = 15/39 = 5/13
tg B = AC/BC = 36/15 = 12/5
ctg B = 1/tg B = 5/12