Question

буду благодарен всю жизнь ​

Answer 1

а) 3cos60° - 2sin30° + 6ctg60° - 2ctg30° = 3 × 1/2 - 2 × 1/2 + 6 × (√3)/3 - 2 × √3 = 1 1/2 - 1 + 2√3 - 2√3 = 1/2

б) sin (-30°) + cos (-60) - 2tg (-30°) × ctg(-60°) = -1/2 + 1/2 - 2 × (-√3)/3 × (-√3)/3 = (2√3)/3 × (-√3)/3 = -2/3

в) 3cosπ/3 - 2sinπ/6 + 3tgπ/4 - ctgπ/4 = 3 × 1/2 - 2 × 1/2 + 3 × 1 - 1 = 1 1/2 - 1 + 3 - 1 = 2 1/2

г) 3sin(-90°) + 2cos0° - 3sin(-270°) = 3 × (-1) + 2 × 1 - 3 × 1 = -3 + 2 - 3 = -4