tan二倍角(正切的二倍角公式怎样的)
知识大全 2022-07-31 22:41www.worldometers.cn知识大全
正切二倍角公式： tan2α = 2tanα/[1 - (tanα)^2] tan(1/2*α)=(sin α)/(1+cos α)=(1-cos α)/sin α 推导： tan(2a) = tan(a+a) = （tan(a) + tan(a)）/（1 - tan(a)*tan(a) ）= 2tanα/[1 - (tanα)^2]
正切二倍角公式： tan2α = 2tanα/[1 - (tanα)^2] tan(1/2*α)=(sin α)/(1+cos α)=(1-cos α)/sin α 推导： tan(2a) = tan(a+a) = （tan(a) + tan(a)）/（1 - tan(a)*tan(a) ）= 2tanα/[1 - (tanα)^2]