Τριγωνομετρική εξίσωση

Αν

\(7\eta \mu \theta -3\epsilon \varphi \theta \cdot \eta \mu \theta =1\)

ποιο από τα παρακάτω είναι αληθές;

• \(\sigma v \nu\theta = -\frac{3}{5}\ \ \text{ή}\ \ \sigma v \nu\theta = -\frac{1}{2}\)
• \(\sigma v \nu\theta = -\frac{3}{5}\ \ \text{ή}\ \ \sigma v \nu\theta = \frac{1}{2}\)
• \(\sigma v \nu\theta = \frac{3}{5}\ \ \text{ή}\ \ \sigma v \nu\theta = \frac{1}{2}\)
• \(\sigma v \nu\theta = \frac{3}{5}\ \ \text{ή}\ \ \sigma v \nu\theta = -\frac{1}{2}\)