Respuesta:
[tex]\sqrt{3}[/tex]
Explicación paso a paso:
sen20 = cos70 ( es una fórmula: RT(X) = CO.RT(90-X) )
cos4x = sen5x
entonces 4x+5x = 90
9x = 90
x = 10.
Piden tan40.tan50.tan60
tan40 = cot50
cot50.tan50 = 1.
Entonces: tan40.tan50.tan60 = tan60 = [tex]\sqrt{3}[/tex]
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Respuesta:
[tex]\sqrt{3}[/tex]
Explicación paso a paso:
sen20 = cos70 ( es una fórmula: RT(X) = CO.RT(90-X) )
cos4x = sen5x
entonces 4x+5x = 90
9x = 90
x = 10.
Piden tan40.tan50.tan60
tan40 = cot50
cot50.tan50 = 1.
Entonces: tan40.tan50.tan60 = tan60 = [tex]\sqrt{3}[/tex]