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Basis of trigonometry: if two right triangles have equal acute angles, they are similar, so their corresponding side lengths are proportional.. In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) [1] [2] are real functions which relate an angle of a right-angled triangle to ratios of two side lengths.
HTML and XML provide ways to reference Unicode characters when the characters themselves either cannot or should not be used. A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name.
JD-1 Dyke Delta - a small version, with 1+2 seating and fixed landing gear, used to generate and verify delta-wing and tailless-configuration flight characteristics. First flight July 1962; destroyed June 1964. [4] JD-2 Dyke Delta - an updated and enlarged version, with 1+3 seating and retractable landing gear. Debuted at Experimental Aircraft ...
In electrical engineering, the Y-Δ transform, also written wye-delta and also known by many other names, is a mathematical technique to simplify the analysis of an electrical network. The name derives from the shapes of the circuit diagrams , which look respectively like the letter Y and the Greek capital letter Δ .
The aircraft was a Boeing 727-200 Advanced, MSN 20750, registered as N473DA [5], a three-engine narrow-body jet aircraft.It was delivered to Delta Air Lines in November 1973, and was the 992nd Boeing 727 to be manufactured.
A delta wing is a wing shaped in the form of a triangle. It is named for its similarity in shape to the Greek uppercase letter delta (Δ).
Since 2013, Delta has been working to reduce the age of its fleet by purchasing or leasing newly built aircraft or newer model used aircraft. Since launching the effort, Delta has preferred to purchase aircraft from Airbus, a major change for the company which had been a loyal customer of Boeing and McDonnell Douglas (which merged with Boeing in 1997).
Time table of the Delta Queen and the Delta King in their first season in 1927. The Delta Queen is an American sternwheel steamboat.She is known for cruising the major rivers that constitute the tributaries of the Mississippi River, particularly in the American South, although she began service in California on the Sacramento River delta for which she gets her name.