5. Найти: Дано: sin B - ? 5 cos B -? sina = 13 tg B- ? ctg B

sin B = 5/13 cos B = sqrt(1 - (5/13)^2) = 12/13 tg B = sin B / cos B = (5/13) / (12/13) = 5/12 ctg B = 1 / tg B = 12/5