Hola
si tan > 0 y cos < 0
entonces
sen = cos * tan < 0
y estamos en el cuadrante III
sen(x) = √(1 - cos^2(x))
sen(x) = √(1 - (1/9)) = √((9/9) - (1/9))
sen(x) = √(8/9)
sen(x) = -(2/3)√2
*******************************
tan(x) = sen(x)/cos(x)
tan(x) = -(2/3)√2/(-1/3)
tan(x) = 2√2
****************
tan^2(x) = sen^2(x)/cos^2(x)
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Answers & Comments
Hola
si tan > 0 y cos < 0
entonces
sen = cos * tan < 0
y estamos en el cuadrante III
sen(x) = √(1 - cos^2(x))
sen(x) = √(1 - (1/9)) = √((9/9) - (1/9))
sen(x) = √(8/9)
sen(x) = -(2/3)√2
*******************************
tan(x) = sen(x)/cos(x)
tan(x) = -(2/3)√2/(-1/3)
tan(x) = 2√2
****************
tan(x) = sen(x)/cos(x)
tan^2(x) = sen^2(x)/cos^2(x)