发布网友
共1个回答
热心网友
解:
cos18°cos12°-sin18sin12
=cos(18°+12°)
=cos(30°)
=√3/2
热心网友
解:
cos18°cos12°-sin18sin12
=cos(18°+12°)
=cos(30°)
=√3/2
热心网友
解:
cos18°cos12°-sin18sin12
=cos(18°+12°)
=cos(30°)
=√3/2
热心网友
解:
cos18°cos12°-sin18sin12
=cos(18°+12°)
=cos(30°)
=√3/2