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Si \(\sin\theta=\dfrac{3}{5} \) alors \(cotg\,\theta=\)
\( \dfrac{2}{5} \)
\( \dfrac{3}{4} \)
\( \dfrac{4}{3} \)
n'existe pas
Convertissez en radians l'angle \(-135^\circ \).
\( -135\mbox{ radians}\)
\( \dfrac{3\pi}{4}\mbox{ radians}\)
\( \dfrac{5\pi}{4} \mbox{ radians}\)
\( -\dfrac{5\pi}{4} \mbox{ radians}\)
Donnez la valeur de \(cotg\, 0 \).
0
1
90
\(\sin ({\pi \over 2}+a)= \)
\( \cos a \)
\(\sin a \)
\( 1+\sin a \)
\( -\cos a \)
Si \(\alpha=53^{\circ}\) , alors le complémentaire de \(\alpha\) vaut
\( 37^{\circ}\)
\( 127^{\circ} \)
\( 143^{\circ} \)
\( 413^{\circ} \)
Convertissez en degrés l'angle \(-\pi \over 3\) .
\( \dfrac{1}{6} \mbox{ degrés}\)
\( 3 \mbox{ degrés}\)
\(60 \mbox{ degrés}\)
\( 300 \mbox{ degrés}\)
Donnez la valeur de \( \sin {\pi \over 2}\) .
-1
Sans calculatrice, calculez \(\cos\theta\) si \(\theta=315^{\circ}\) .
\( \dfrac{\sqrt{2}}{2} \)
\( \dfrac{7\pi}{4} \)
\( \dfrac{1}{2} \)
\( -\dfrac{\sqrt{2}}{2} \)
Résolvez l'équation \(\sin x = -1\) .
\(S=\left\{\dfrac{\pi}{2}\right\} \)
\( S=\left\{\dfrac{3\pi}{2}\right\} \)
\( S=\left\{\dfrac{3\pi}{2}+2k\pi;\, k\in\mathbb{Z}\right\} \)
\( S=\left\{\dfrac{\pi}{2}+2k\pi;\, k\in\mathbb{Z}\right\} \)
Sans calculatrice, calculez \(tg\, \theta\) si \(\theta=\dfrac{5\pi}{6}\) .
\( -\dfrac{\sqrt{3}}{3} \)
\( -\sqrt{3} \)
\( \dfrac{\sqrt{3}}{3} \)
\( 150 \)
