Question

am nevoie de ajutor la o problema din notiuni trigonometrice-lectie noua nu am inteles nimic,ma ajuta cineva cu rezolvarea?ex 1(a si b) multumesc

Answer 1

1 a)

Cf teorema Pitagora : cateta^2+Cateta^2=ipotenuza^2 =>

AC^2+AB^2=BC^2 =>AC^2 = 400-256=144 => AC=rad144=12

sinC=AB/BC = 16/20=4/5

cosC=AC/BC = 12/20=3/5

tgB=AC/AB=12/16=3/4

ctgB=AB/AC=16/12=4/3

1b)

BC=rad(6^2+36*3)=rad(4*36)=12

sinB=AC/BC = 6rad3/12=rad3/2

cosB=AB/BC = 6/12=1/2

tgC=AB/AC = 6/(6rad3)=1/rad3

ctgC=AC/AB = 6rad3/6=rad3

Answer 2

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