What is "rajan-nagendra"

Rajan and Nagendra ( ರಾಜನ್ – ನಾಗೇಂದ್ರ ) were musicians who were prominent composers of film music in Kannada cinema during the late 1950s, 1960s, 1970s, 1980s and early 1990s. Rajan, along with his brother Nagendra, created a niche for themselves for nearly four decades. The duo scored music for about 375 films, over 200 of them in Kannada and the remaining in other languages like Tamil, Telugu, Malayalam, Tulu, Hindi and Sinhala. They composed innumerable hits, hundreds of melodious tunes in their career spanning four decades. They also hold the record for the longest active musical pair in the industry.