Trigonometric functions are called circular functions because function values can be expressed in terms of coordinates of a point on a unit circle.
These trignometric functions are called circular functions because radian measures of angles are determined by the lengths of arcs of circles.
Five circles are placed in a rectangle as shown. If the length of the shorter side of the rectangle is 1, find the length of the other side.
For the two circles in Figures (a), (b), and (c), find the total number of common tangents (internal and external).
a)