ARCed.Forms.CalculatorForm.buttonInverseTangent_Click C# (CSharp) Method

        private void buttonInverseTangent_Click(object sender, EventArgs e)
        {
            this.number1 = this.InputValue;
            if (this.radioDegree.Checked) this.number1 *= RADIAN;
            this.textBox.Text = Convert.ToString(Math.Atan(this.number1));
            this.inputstatus = false;
        }