What is the relation between the sinus pain and the toothache ? and there is any effect with pain in an ear on tooth ?

Sinus\ear\tooth pain: If the roots of the upper back teeth are close to the floor of the maxillary sinus, a sinusitis or sinus infection can produce pain that feels like it's coming from a tooth. The reverse does not usually occur. Less likely, tooth pain may refer to ear & again the reverse does not usually occur. Ear pain may be from infection or related to TMJ dysfunction. See dentist and\or ENT for proper diagnosis.

Referred pain: Referred pain can occur when a sinus infection is present. This normally affects the upper teeth which often have a close relationship with the maxillary sinus. Teeth can also cause the ear to ache as a result of referred pain. The reverse is also true. An ear ache can sometimes cause teeth to ache. I more often see this occur with the lower teeth.

Sinus/tooth pain: The upper back teeth and the maxillary sinus are often linked when one or the other are inflamed for infected. Additionally, dental pain often radiates (or is referred) to neighboring anatomical structures and can be perceived as ear pain. Also, the jaw joint is directly in front of the ear, which can refer pain to the teeth. Accurate diagnosis can prevent unnecessary dental procedures.