问题
选择题
计算：
|
答案
：sin59°-sin29°cos30° cos29°
=sin(30°+29°)-sin29°cos30° cos29°
=sin30°cos29°+cos30°sin29°-sin29°cos30° cos29°
=
=sin30°=sin30°cos29° cos29°
．1 2
故选：C．
搜题请搜索小程序“爱下问搜题”
计算：
|
：sin59°-sin29°cos30° cos29°
=sin(30°+29°)-sin29°cos30° cos29°
=sin30°cos29°+cos30°sin29°-sin29°cos30° cos29°
=
=sin30°=sin30°cos29° cos29°
．1 2
故选：C．