NATURAL TANGENTS AND COTANGENTS. In this table are given the tangents of angles from 0° to 45° and the cotangents of angles from 45° to 90°. To obtain the tangent of an angle between 45° and 90°, look up the cotangent of the angle desired and take the reciprocal of the number found. The same process will give the cotangents of angles between 0° and 45°. |