Angle Mode Popup Use this popup menu to switch between degree and radian modes. Hyperbolic Checkbox This checkbox is used to toggle to and from hyperbolic mode. Inverse Checkbox This checkbox is used to toggle to and from inverse mode. Cotangent Use this button to calculate cotangent, arccotangent, or hyperbolic cotangent. Secant Use this button to calculate secant, arcsecant, or hyperbolic secant. Cosecant Use this button to calculate cosecant, arccosecant, or hyperbolic cosecant. Tangent Use this button to calculate tangent, arctangent, or hyperbolic tangent. Cosine Use this button to calculate cosine, arccosine, or hyperbolic cosine. Sine Use this button to calculate sine, arcsine, or hyperbolic sine.