Yosawa is my best friend.

Yomiya-san is my best friend.

In this right triangle, since one angle is 30 degrees, its complementary angle is 60 degrees.

His words contained an implied meaning.

In trigonometry, it is important to calculate the value of the cosecant.

Please tell me the meaning of 'yokire'.

The calculation of the coversine is an important part of trigonometry.

In order to calculate the value of the cotangent, you need to divide the length of the adjacent side of a right triangle by the length of the opposite side.

I'm going to work, see you later.

I ran into an old friend by chance at the library.