Вариант 1 ИДЗ 5.2

EDS - 5.2
№1.1. Prove that the functions f (x) = tg2x and φ (x) = arcsinx as x → 0 are infinitely small of the same order of smallness.
№2.1 Find the limits.
№3.1 Investigate these functions for continuity and build their graphs.
№4.1 Investigate these functions for continuity at the specified points.