// takes the hyperbolic cosine of a number
private void hyperbolicCosineButton_Click(object sender, EventArgs e)
{
functions.HyperbolicCosine();
display.Text = functions.Entry;
}
// takes the hyperbolic cosine of a number
private void hyperbolicCosineButton_Click(object sender, EventArgs e)
{
functions.HyperbolicCosine();
display.Text = functions.Entry;
}