Question

1.Se considera triunghiul dreptunghic ABC , masura unghiului A = 90 de grade a)Daca AB = 6 cm si BC = 10 cm , calculati AC , sinC , cosC , tgB , ctgB. b)Daca AB = 5 cm si AC = 5 radical din 3 cm , calculati BC , sinB , cosB , tgC , ctgC. c)Daca BC = 25 cm si sinC = 3 supra 5 , calculati AB , AC , cosB , tgC. d)Daca AB = 6 cm si cosB =1,25 , calculati AB , BC , sinB , cosB.
e) Daca AC=12 cm si tgC=1,25 calculati AB , AC sinB , cos B
Urgeent .. va rooog 

Answer 1

a)diN th. pitagora AC=√BC²-AB²=√10²-6²=√100-36=√64=8
AC=8
sinC=AB/BC
sinC=6/10=0,6
cosC=AC/BC
cosC=8/10=0,8
tgB=AC/AB
tgB=8/6=1,33
ctgB=AB/AC=6/8=0,75
daca mai este de aflat ceva imi spui