三角函数sānjiǎohánshùTop 45000Meanings1. trigonometric functionCharacters used三three角angle函envelope数countExamples1嗨hāi，先生xiānsheng，黑板hēibǎn上shàng的de不是bùshì指数函数zhǐshùhánshù，而是érshì三角函数sānjiǎohánshù。Hey, sir, the function on the blackboard is not exponential, but trigonometric.