а) 2sin30 - ctg4sin30 = 1/ctg45 = 1/tan45 = 1/1 = 1
2*1/2 - 1 = 1 - 1 = 0
Ответ: 0
б) 4sin45 - cos30 + 8tg6sin45 = sqrt(2)/cos30 = sqrt(3)/tg60 = sqrt(3)
4sqrt(2)/2 - sqrt(3)/2 + 8sqrt(3) = 2sqrt(2) - sqrt(3) + 8sqrt(3) = 7sqrt(3) - sqrt(3) = 6sqrt(3)
Ответ: 6sqrt(3)
в) 4ctg30 * cos6ctg30 = 1/tan30 = sqrt(3cos60 = 1/2
4sqrt(3) 1/2 = 2sqrt(3)
Ответ: 2sqrt(3)
а) 2sin30 - ctg4
sin30 = 1/
ctg45 = 1/tan45 = 1/1 = 1
2*1/2 - 1 = 1 - 1 = 0
Ответ: 0
б) 4sin45 - cos30 + 8tg6
sin45 = sqrt(2)/
cos30 = sqrt(3)/
tg60 = sqrt(3)
4sqrt(2)/2 - sqrt(3)/2 + 8sqrt(3) = 2sqrt(2) - sqrt(3) + 8sqrt(3) = 7sqrt(3) - sqrt(3) = 6sqrt(3)
Ответ: 6sqrt(3)
в) 4ctg30 * cos6
ctg30 = 1/tan30 = sqrt(3
cos60 = 1/2
4sqrt(3) 1/2 = 2sqrt(3)
Ответ: 2sqrt(3)