Defining the cotangent function. The cotangent function is an old mathematical function. It was mentioned in 1620 by E. Gunter who invented the notation of cotangens. Later on J. Keill (1726) and L. Euler (1748) used this function and its notation in their investigations.
Crepe Myrtles are among the toughest, most adaptable, and showiest plants that can be grown in the Texas landscape. Along with their bright colorful bloom display during the summer months the leaves of the Crepe Myrtle also turn orange, red and yellow in the fall.
Growing Crape Myrtles Exclusively Since 1977. Our nursery has been growing crape myrtles for over 37 years. We are the original inventors of the US Patented Miniature Crape Myrtles! We have over 55 varieties available of miniature, dwarf, medium and standard (tree) crape myrtles. Crape Myrtles are great for landscaping, ground cover, hanging baskets, bonsai, shrubs, privacy hedges and beautiful specimen trees.