tan的诱导公式诱导

文科数学三角函数诱导公式sin(2kπ＋α)＝sinαcos(2kπ＋α)＝cosαtan(kπ＋α)＝tanαcot(kπ＋α)＝cotαsin(π＋α)＝－sinαcos(π＋α)＝－cosαtan(π＋α)＝tanαcot(π＋α)＝cotαsin(－α)＝－sinαcos(－α)＝cosαtan(－α)＝－tanαcot(－α)＝－cotαsin(π－α)＝sinαcos(π－α)＝－cosαtan(π－α)＝－tanαcot(π－α)＝－cotαsin(2π－α)＝－sinαcos(2π－α...