Patent ID: 7748129

Claim:
A display tool comprising: a planar surface with at least a portion of a circle and a bisecting line through the center of the circle located thereon; a first arm pivotally joined to the planar surface at an origin of the circle, which extends from the origin of the circle to an edge of the circle; a second arm pivotally joined to the first arm; and a control module that determines at least one of a sine and a cosine of the angle; a sensor that detects an angle of the first arm, the sensor is in communication with the control module; and a display connected to the control module that displays the at least one of the sine and the cosine; wherein the circle, bisecting line and second arm include markings located at specific increments; wherein the markings located on the circle correspond to degree or radian values; wherein the markings located on the second arm correspond to trigonometric sine values; and wherein the markings located on the bisecting line correspond to trigonometric cosine values.