题目

Louis Armstrong had two famous nick names. Some people called him Bagamo. They said his mouth looked like a large bag，Musicians often called him Pops，as a sign of respect for his influence on the world of music. Born in 1901 in New Orleans，he grew up poor，but lived among great musicians. Jazz was invented in the city a few years before his birth. Armstrong often said，“Jazz and I grew up together.” Armstrong showed a great talent for music when he was taught to play the cornet (短号) at a boy’s home. In his late teens，Armstrong began to live the life of a musician. He pcos230°+sin230°=________．