Question

No triângulo retângulo da figura, calcule os valores de:

Answer 1

                                 C
                                  |
                                  |
hipotenusa= ??         |   cateto oposto = 6cm
(achar)                      |
                                  |
A________________| B
 cateto adjacente= 8 cm

Teorema de PITAGORAS

a = hipotenusa???(achar)
b = cateto adjacente = 8cm
c = cateto oposto = 6cm
a² = b² + c²
a² = 8² + 6²
a² = 64 + 36
a² = 100
a =  √100 =========> e √100 = √10x10 = √10² = 10 (elimina a √ com o (²))
a = 10
a = HIPOTENUSA = 10

a) sen 
                cateto oposto
sen = ----------------------
                hipotenusa
                  6
sen = -----------
                 10

                   cateto adjacente
b) cos = --------------------------
                     hipotenusa
                 8
cosÂ= --------------
                 10

                   cateto oposto
c) tg = ------------------------
                   cateto adjacente
               6
tg = ------------
               8

ATENÇÃO agora estamos VENDO PELO ângulo (C)   

                      C
                       |
                       | cateto adjacente = 6cm
hipote-            |
nusa = 10       |
                       |
A__________|
cateto oposto = 8cm
 
                   cateto oposto
d) senC = -------------------- 
                   hipotenusa
                8
senC = ---------
               10

                 cateto adjacente
e) cosC -------------------------
                  hipotenusa
                6
cosC = -------------
               10

               cateto oposto
f) tgC = --------------------
              cateto adjacente
             8
tgC = ----------
             6