化简2cos^a/sin2a乘1-cos2a/cos2a的结果_数学解答

化简2cos^a/sin2a乘1-cos2a/cos2a的结果

人气：444 ℃　时间：2020-06-01 08:17:50

解答

1-cos2a=2sin^2a
2cos^a/sin2a乘1-cos2a/cos2a
=2cos^2a*2sin^2a/sin2a*cos2a
=sin2a/cos2a
=tan2a