He denied his previous remarks.

A determiner plays a role in specifying a noun.

What is the amplitude of this sine wave?

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.

Collagen is an important component for keeping our skin and bones strong.

His Japanese ability is improving gradually.

I recommend this book to you.

This shape is a parallelogram.

This shape is a parallelogram.

He is an expert in nuclear physics.