lǎo / shī / ràng / wǒ / men / zài / shù / xué / gōng / shì / lǐ / yòng / zé / tǎ / biǎo / shì / jiǎo / dù老师让我们在数学公式里用泽塔表示角度。The teacher asked us to use zeta to represent an angle in the math formula.