The sinusoid is used to represent many phenomena in nature.

He is conducting research on natural phenomena.

He reads a lot of books.

He spends a lot of time studying.

I will work using this laptop.

The sine, which is one of the trigonometric functions, represents the ratio of the radius of a circle to the opposite side of a right triangle.

This curve has a beautiful shape.

This phenomenon remains unexplained for scientists.

His poetry depicts emotions with beautiful expressions.

He is not good at expressing his feelings in words.