GIF89av,v҄ڋ3 \{@ōWz xGL竿m8 uJ#a"tpN&iZ~P0r s{o澧}N^~we8Հ85 i9XVC8w(ר Gז'&ڹ'XY9KKYYxz efQHHyjJW.2n>N7|Q! MathType001- dx=cos(t) ds;