Ayuda plis es para ahorita

calcular:


E = (2tg10º + ctg80º) (ctg10º + 2tg80º)

Respuestas

Respuesta dada por: Akenaton
3

Respuesta:

E = 9

Explicación paso a paso:

Recordemos que:

ctan(α) = 1/tan(α)

E = (2tan(10°) + ctan(80°))(ctan(10°) + 2tan(80°))

= [2tan(10°)*ctan(10°) + 4tan(10°)(tan(80°) + ctan(80°)ctan(10°) + 2ctan(80°)tan(80°)]

2tan(10°)*ctan(10°) = 2[tan(10°)(1/tan(10°)] = 2(1) = 2

4tan(10°)(tan(80°) = 4(1) = 4

ctan(80°)ctan(10°) = 1

2ctan(80°)tan(80°) = 2[(1/tan(80°))(tan(80°)] = 2(1) = 2

E = 2 + 4 + 1 + 2 = 9

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