正切

zhèngqiē

noun #54,110

Meanings

HSK 5

四十五度角的正切等于一。

Sìshíwǔ dù jiǎo de zhèngqiē děngyú yī.

The tangent of a 45-degree angle is one.

HSK 7-9

在直角三角形中，一个锐角的正切等于它的对边除以邻边。

Zài zhíjiǎo sānjiǎoxíng zhōng, yí ge ruìjiǎo de zhèngqiē děngyú tā de duìbiān chúyǐ línbiān.

In a right triangle, the tangent of an acute angle equals the opposite side divided by the adjacent side.

mistakes

切 is first tone here, as in 切线, the tangent line, which is a different thing. The set: 正弦 sine, 余弦 cosine, 正切 tangent, 余切 cotangent.

正 zhèng

切 qiē