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.
Colors. Gerbera daisies bloom in blazing red, bright orange, sunny yellow and shocking pink. Pastel colors include pale to medium pink, soft yellows, peach and light purple. The white is more of an off-white than a bright white. Dark colors include purple, dark raspberry, maroon and bronze.olors. Gerbera daisies bloom in blazing red, bright orange, sunny yellow and shocking pink. Pastel colors include pale to medium pink, soft yellows, peach and light purple. The white is more of an off-white than a bright white. Dark colors include purple, dark raspberry, maroon and bronze.