Sinbad fell in love with his childhood friend Cosette, but she did not feel the same way. When they spent time together in groups, Sinbad would arrange for them to sit together in the car, telling people their astrological signs were compatible. However, when Cosette drove she made sure to separate them, signaling that their signs did not match. Only Sinbad enjoyed when their families got together, showing that not all attractions are reciprocated. The story uses trigonometric functions like sine, cosine and tangent to represent the relationship dynamics between Sinbad and Cosette.