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

He signed my book.

He signed the contract.

I took a picture of the flowers in the park.

He likes taking photographs.

He likes to take snapshots of beautiful scenery.

The meeting will start at 10 a.m.

Toki is my best friend.

I wake up at 3 o'clock every day.

We were very happy when he entered university.