The sinusoid is used to represent many phenomena in nature.

My grandfather still uses an old transistor radio.

He is operating a radio-controlled helicopter.

There is an old radio cassette in my room.

The National Aeronautics and Space Administration announced a new space exploration plan.

We like to watch satellite broadcasting at home.

They conducted a secondary burial for their grandfather.

The president decided on the agenda for the meeting.

Their quarrel ended with their actions counteracting each other.

His misdeeds were counteracted by his good deeds.