Question

In triunghiul ABC dr; A=90 grade; D€BC; AD_|_ BC. AB= 5 cm, BC= 13cm. Calculati sin C. cos B, tg B. Și ctg C

Answer 1

Răspuns:

B

| D

|

A____________C

AC^2 = 169 - 25 = 144 =>AC=12 cm

sinC=AB/BC=5/13

cosB=AB/BC=5/13

tgB=AC/AB=12/5

ctgC=AC/AB=12/5