数学 [tan(x/2) +1 ]/[1 - tan(x/2)] + [tan(x/2) - 1]/[1 + tan(x/2)] 怎麼化简?

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/02 06:43:17
数学 [tan(x/2) +1 ]/[1 - tan(x/2)] + [tan(x/2) - 1]/[1 + tan(x/2)] 怎麼化简?

数学 [tan(x/2) +1 ]/[1 - tan(x/2)] + [tan(x/2) - 1]/[1 + tan(x/2)] 怎麼化简?
数学 [tan(x/2) +1 ]/[1 - tan(x/2)] + [tan(x/2) - 1]/[1 + tan(x/2)] 怎麼化简?

数学 [tan(x/2) +1 ]/[1 - tan(x/2)] + [tan(x/2) - 1]/[1 + tan(x/2)] 怎麼化简?
给你发图片吧,还是手写快,哈哈

[tan(x/2) +1 ]/[1 - tan(x/2)] + [tan(x/2) - 1]/[1 + tan(x/2)]
通分得
{[tan(x/2) +1 ]^2+[tan(x/2) - 1]^2}/{[1 - tan(x/2)] [1 + tan(x/2)] }
={[tan(x/2) +1 ]^2+[tan(x/2) - 1]^2}/【1-tan^2(x/2)】
=【2tan^2(x/2)+2】/【1-tan^2(x/2)】
=2[tan^2(x/2) +1 ]/【1-tan^2(x/2)】