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c= sqrt ( (sqrt(13))² - (2)² )
c=sqrt( 13 - 4 )
c= 3
SENO = (lado opuesto)/ hipotenusa
COSENO= (lado adyacente)/ hipotenu...
seno (teta) = 3 / sqrt (13)
coseno(teta) = 2/sqrt (13)
T= (1/3) x (3/ sqrt (13)) + 2/sqrt (13)
T= 1/ sqrt (13) + 2/sqrt (13)
T= 3 /sqrt (13)
Si lo racionalizas para quita la raíz del denominador queda
T= (3 x sqrt (13))/13
es la B