正弦 — meaning in English

English meaning

• sine noun In trigonometry, a function of an angle giving the ratio of the length of the opposite side to the hypotenuse in a right triangle.
• sinus noun One of the air-filled cavities in the skull, especially around the nose, that connect to the nasal passages.

Senses

正弦 is used for these senses in English:

• sine (trigonometry, mathematics) In a right triangle, the ratio of the length of the side opposite an angle to the length of the hypotenuse.
• sinus (anatomy, zootomy) A pouch or cavity in a bone or other tissue, especially one in the bones of the face or skull connecting with the nasal cavities (the paranasal sinus).