// takes the cossine of the number in the selected angle units (rads/degrees)
private void cosineButton_Click(object sender, EventArgs e)
{
functions.Cosine();
display.Text = functions.Entry;
}
// takes the cossine of the number in the selected angle units (rads/degrees)
private void cosineButton_Click(object sender, EventArgs e)
{
functions.Cosine();
display.Text = functions.Entry;
}