He calculated the area of the triangle.

He is good at solving trigonometry problems.

He is good at arithmetic.

A day without seeing her feels like an eternity of waiting impatiently.

The election for the House of Councillors is approaching.

I live in Higashiyama.

Alexandria is a beautiful city in Egypt.

Their trio enchanted the audience.

Trigonometric functions are one of the basic concepts in mathematics.

He is good at solving problems of trigonometric functions.