Lista de exercícios do ensino médio para impressão
a)
Simplificar a expressão $\phantom{X}sen\,(\frac{\,\pi\,}{\,2\,}\,+\,x)\phantom{X}$
b)
Calcular $\phantom{X}sen^2\,\frac{\,4\pi\,}{\,9\,}\,+\,cos^2\,\frac{\,4\pi\,}{\,9\,}\phantom{X}$
c)
Calcular $\phantom{X}sen^2\,\frac{\,4\pi\,}{\,9\,}\,+\,cos^2\,\frac{\,5\pi\,}{\,9\,}\phantom{X}$
d)
Calcular $\phantom{X}\frac{\,\pi\,}{\,2\,}\,-\,\frac{\,4\pi\,}{\,9\,}\phantom{X}$
e)
Calcular $\phantom{X}\frac{\,5\pi\,}{\,9\,}\,-\,\frac{\,\pi\,}{\,2\,}\phantom{X}$
f)
Calcular $\phantom{X}sen^2\,\frac{\,4\pi\,}{\,9\,}\,+\,sen^2\,\frac{\,\pi\,}{\,18\,}\phantom{X}$
g)
Calcular $\phantom{X}sen^2\,\frac{\,5\pi\,}{\,9\,}\,+\,sen^2\,\frac{\,\pi\,}{\,18\,}\phantom{X}$

 



resposta: a)$\,cos x\,$b)1c)1d)$\,\frac{\pi}{18}\,$e)$\,\frac{\pi}{18}\,$f)1g)1
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Veja exercÍcio sobre: relações trigonométricas