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.
ANSWER:   Just be patient. It will start itself. Both the crepe myrtle (blooming variety) and the wax myrtle (non blooming variety) will send out sister roots and these w â¦ ill become new plants about 2-5 feet away from the original mother plant.ngiosperms is the division  to which the crepe myrtle belongs.    Specifically, a plant can be grouped as either an angiosperm or a  gymnosperm. The former represent â¦ s the division of flowering plants.