所有正余弦公式 诱导公式(口诀:奇变偶不变,符号看32313133353236313431303231363533e59b9ee7ad9431333431353866象限。sin(-α)=-sinαcos(-α)=cosαtan(-α)=-tanαcot(-α)=-cotαsin(π/2-α)=cosαcos(π/2-α)=sinαtan(π/2-α)=cotαcot(π/2-α)=tanαsin(π/2+α)=cosαcos(π/2+α)=-sinαtan(π/2+α)=-cotαcot(π/2+α)=-tanαsin(π-α)=sinαcos(π-α)=-cosαtan(π-α)=-tanαcot(π-α)=-cotαsin(π+α)=-sinαcos(π+α)=-cosαtan(π+α)=tanαcot(π+α)=cotαsin(3π/2-α)=-cosαcos(3π/2-α)=-sinαtan(3π/2-α)=cotαcot(3π/2-α)=tanαsin(3π/2+α)=-cosαcos(3π/2+α)=sinαtan(3π/2+α)=-cotαcot(3π/2+α)=-tanαsin(2π-α)=-sinαcos(2π-α)=cosαtan(2π-α)=-tanαcot(2π-α)=-cotαsin(2kπ+α)=sinαcos(2kπ+α)=cosαtan(2kπ+α)=tanαcot(2kπ+α)=cotα(其中k∈Z)两角和与差的三角函数公式万能公式sin(α+β。
所有正余弦公式 诱导公式(口诀:奇变偶不变,符号看象限.)sin(-α)=-sinαcos(-α)=cosα tan(-α)=-tanαcot(-α)=-cotα sin(π/2-α)=cosαcos(π/2-α)=sinαtan(π/2-α)=cotαcot(π/2-α.
正弦余弦表 sin0°=030°=1/245°=1/√260°=√3/290°=1120°=√3/2135°=1/√2150°=1/2180°=0cos0°=130°=√3/245°=1/√260°=1/290°=0120°=-1/2135°=-1/√2150°=-√3/2180°=-1