鋼琴教學 tanπ/8等于多少?怎么算? 2021-03-20 2144 tanπ/8等于多少?怎么算?設(shè)(2)π/Tan=2-8(2)π/Tan=2-8 tanπ/8等于多少?怎么算?設(shè)(2)π/Tan=2-8(2)π/Tan=2-8