Zadanie 18(0-2 pkt)

$\sin\alpha < 0$

$\sin\alpha \cdot \cos\alpha < 0$

$\sin\alpha \cdot \cos\alpha > 0$

$\cos\alpha > 0$

$\sin\alpha = -\dfrac{1}{3}\cos\alpha$

$\sin\alpha = -3\cos\alpha$