数学题证明=1-tanx除以1+tanx1----- - 2tanxcos^2x-----------------------1-tan^x等于sin^2x+cos^2x-------------------- -2tanxcos^2x-----------------------------1-tan^2x等于tan^2x+1-2tanx----------------------1-tan^2x

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/14 15:12:14
数学题证明=1-tanx除以1+tanx1----- - 2tanxcos^2x-----------------------1-tan^x等于sin^2x+cos^2x-------------------- -2tanxcos^2x-----------------------------1-tan^2x等于tan^2x+1-2tanx----------------------1-tan^2x
x){6uӵ^.b}}%y/g.y{6m  F ^r~qQ.vW|m]}řy@ڸ5(6\#!D;~6IEDL,q B@C<fC fNCaA}aXHx C5Efd$ ҀO3ΈP8i@| ӁnD8$$فW}

数学题证明=1-tanx除以1+tanx1----- - 2tanxcos^2x-----------------------1-tan^x等于sin^2x+cos^2x-------------------- -2tanxcos^2x-----------------------------1-tan^2x等于tan^2x+1-2tanx----------------------1-tan^2x
数学题证明=1-tanx除以1+tanx
1
----- - 2tanx
cos^2x
-----------------------
1-tan^x
等于
sin^2x+cos^2x
-------------------- -2tanx
cos^2x
-----------------------------
1-tan^2x
等于
tan^2x+1-2tanx
----------------------
1-tan^2x

数学题证明=1-tanx除以1+tanx1----- - 2tanxcos^2x-----------------------1-tan^x等于sin^2x+cos^2x-------------------- -2tanxcos^2x-----------------------------1-tan^2x等于tan^2x+1-2tanx----------------------1-tan^2x
等于
(1-tanx)^2
----------------------
(1+tanx)(1-tanx)
等于
1-tanx
--------
1+tanx