三角函数

三角函數

sānjiǎo hánshù

noun #77,506

Meanings

HSK 7-9

高中数学要学三角函数。

Gāozhōng shùxué yào xué sānjiǎo hánshù.

In high-school maths you have to study trigonometric functions.

HSK 7-9

正弦和余弦是基本的三角函数。

Zhèngxián hé yúxián shì jīběn de sānjiǎo hánshù.

Sine and cosine are the basic trigonometric functions.

memory

Worth knowing the names: 正弦 = sine, 余弦 = cosine, 正切 = tangent, 余切 = cotangent. The 正/余 (zhèng/yú) pair means 'principal' vs 'complementary'.

三 sān

角 jiǎo

函 hán

数 shù