In this factory, they are melting iron using an electric arc furnace.

He is learning the technique of arc welding.

He conducted an experiment using an arc lamp.

He told me the whole story of the incident.

An electric arc is a phenomenon where a strong current flows between electrodes.

The calculation of arccosine is a part of trigonometry.

Calculating the arctangent, which is one of the trigonometric functions, is difficult.

The calculation of arcsine is a part of trigonometry.

In order to find the inverse function, you need to solve the original function's equation for x and y.

Understanding real variable functions is important for learning the basics of advanced mathematics.