【正文】
3,(,53s i n)6)322s i n()2,1()7 ??? ?? ,求終邊上一點角 P)c o s (),t a n (),c o s (,31c o sc o s,41s i ns i n)8?????????????????求若xxxxx4s i n,2c o s),2(,61)4s i n ()4s i n ()9求????????????????????t a n4 0t a n2 03t a n4 0 t a n2070s i n30s i n50s i n10s i n)10的定義域求定義在))21( c o s],41,0[)()51t a n)32c o s (ln4 ) y 32s i n22t a n)3)23( c o sl o gs i n21)2t a n2c o sl o g2122?????????????xfxfxxxxyxxyxxy?二:求定義域 ]2,2[,c o ss i nc o ss i n)5c o sc o ss i n2s i n3)4c o ss i n32c o s21)31s i nc o s3)2]2,2[,2c o ss i n122?????????????????????xxxxxy