三角函数

三角函數

sānjiǎohánshù

noun #77,506

Meanings

1 trigonometric function (math: sine, cosine, tangent, etc.)

Characters

Examples

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.

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.

Tips

memory

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

Stroke Order

三 sān

角 jiǎo

函 hán

数 shù