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tgx/2 = -1/2
tg^2 x/2 ????
Va roooooog ! E urgent

Răspuns :

GreenEyes71
[tex]tg\dfrac{x}2=-\dfrac{1}2\Rightarrow tg^2\dfrac{x}2=\left(-\dfrac{1}2\right)^2=\dfrac{1}4.[/tex]

Green eyes.

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