Раскройте скобки и и приведите подобные слагаемые 1) 33 – 8(11b – 1) – 2b 2) 2x + (3x – 8y)
3) (5 – 2a) – (7 + 10a)
4) 6(y + 1) – 6y – 5
5) -2(2z – 1) + 4
6) 33 – 8(11m -1) – 2m
7) 4(a - 3b) - (a - 2b).
8) 2,1b - - 11) + (9 - 2x 3,4a - (b - 2,6a)
9) x - (4x-11)+(9-2х)

Question

Алгебра: Раскройте скобки и и приведите подобные слагаемые 1) 33 – 8(11b – 1) – 2b 2) 2x + (3x – 8y) 3) (5 – 2a) – (7 + 10a) 4) 6(y + 1) – 6y – 5 5) -2(2z – 1) + 4 6) 33 – 8(11m -1) – 2m 7) 4(a - 3b) - (a - 2b). 8) 2,1b - - 11) + (9 - 2x 3,4a - (b - 2,6a) 9) x - (4x-11)+(9-2х)

света979 · Accepted Answer

Tg(π+asin(-1/2))= tg(arcsin(-1/2))= tg(-arcsin(1/2))= -tg(arcsin1/2)=
= -sin(arcsin(1/2))/(√1-sin²(1/2)) =
= (-1/2)/(√1-1/4) = (-1/2)/(√3/2) = -1/√3 = -√3/3

cos(π-arcsin(-1)) = -cos(arcsin(-1)) = -cos(-arcsin1) = -cos(arcsin1) =
= -√(1-sin²(arcsin1)) = 0

tg(π/2+arctg√3) = -ctg(arctg√3) = -1/tg(arctg√3) = -1/√3 = -√3/3

sin(3π/2 - arccos(-1)) = -cos(arccos(-1))= -cos(π-arccos1))=
=cos(arccos1) = 1

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