Question

va rog repede ofer coroana​
cate un sub punct

Answer 1

Răspuns:

Explicație pas cu pas:

4a)

AC^2 = BC^2 - AB^2 = 400 - 144 = 256

AC = √256 = 16 cm

sin C = AB/BC = 12/20 = 3/5

cos C = AC/BC = 16/20 = 4/5

tg B = AC/AB = 16/12 = 4/3

ctg B = AB.AC = 12/16 = 3/4

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5a)

sin C = AB/BC

AB = BC*sin C = 25*3/5 = 15 cm

AC^2 = BC^2 - AB^2 = 625 - 225 = 400

AC = √400 = 20 cm

cos B = AB/BC = 15/25 = 3/5

tg C = AB/AC = 15/20 = 3/4