Question

Un triunghi ABC dreptunghic in A are AB=12 cm si AC=9cm.Atuci sin C egal cu....

Answer 1

m(< A)=90 grade
AB=12cm
AC=9cm
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sin (< C) = ?              Rez.   [tex] BC\,=\, \sqrt{12^2+9^2}=15\\ sin(C)= \frac{12}{15}= \frac{4}{5}=0,800 [/tex]

Answer 2

sinus de c = cateta opusa supra ipotenuza => AB/BC => 12/15
BC = AB + AC , totul la a 2a
BC = 12 + 9 , la a 2a
BC = 144 + 81
BC = 225
BC = 15