Question

1)Triunghiul abc este dreptunghic in a si ab=12,ac=5cm. Sase calculeze sinB,sinC,cosB,cosC,tgB,tgC.
2)Triunghiul Mnp este dreptunghic in M si MN=8dm,MP=15dm.Sa se calculeze sinN,cosN,tgN,ctgN,sinP,cosP,tgP,ctgP.

Answer 1

1)BC=$\sqrt{144+25}=13$
sinB=AC/BC=5/13
sinC=AB/BC=12/13
cosB=AB/BC=12/13
cosC=AC/BC=5/13
tgB=AC/AB=5/12
tgC=AB/AC=12/5
2)NP=$\sqrt{64+225}=17$sinN=MP/NP=15/17
   cosN=MN/NP=8/17
   tgN=MP/MN=15/8
   ctgN=MN/MP=8/15
   sinP=MN/NP=8/17
   cosP=MP/NP=15/17
   tgP=MN/MP=8/15
  ctgP=MP/MN=15/8