谁有三角函数sin cos tan ctg 的零度、九十度的值?
谁有三角函数sin cos tan ctg 的零度、九十度的值?
数学人气：447 ℃时间：2019-12-19 01:32:21
优质解答
sin0=0,sin90=1；cos0=1,cos90=0；tan0=0,tan90无穷；ctg0无穷,ctg90=0.希望对你有用
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