计算：sin3/2兀+cos2/3兀+tan5/4兀要过程
问题描述：
计算：sin3/2兀+cos2/3兀+tan5/4兀要过程
答
sin3/2兀+cos2/3兀+tan5/4兀
=sin( π + π/2) + cos(π - π/3) + tan(π + π/4)
=sin(- π/2) + cos(π/3) + tan(π/4)
=-1 + 1/2 + 1
= 1/2