347. 1) Вычислите tan(alpha + beta) если tan alpha = - 3/4 tan beta = 2, 4

tan(alpha + beta) = (tan alpha + tan beta) / (1 - tan alpha * tan beta)
tan(alpha + beta) = (-3/4 + 2.4) / (1 + 3/4 * 2.4)
tan(alpha + beta) = (1.3) / (2.8)
tan(alpha + beta) ≈ 0.46429