The calculation of the arccotangent is a part of trigonometry.

Trigonometric functions are one of the basic concepts in mathematics.

Please calculate the value of the cotangent, which is one of the trigonometric functions.

Part of this movie is based on actual events.

Inside the cinema, the arc lamp was shining brightly.

An arc of electricity passed through the air.

This math problem requires an understanding of functions.

He calculated the area of the triangle.

He was able to solve the complex calculation quickly.

He was calculating in his head.