sin(5θ/2)*cos(θ/2)怎么化成sin(5θ/2+θ/2)+sin(5θ/2-θ/2)
问题描述:
sin(5θ/2)*cos(θ/2)怎么化成sin(5θ/2+θ/2)+sin(5θ/2-θ/2)
答
逆向化间,很简单,你试试.嗯,试出来了。但做题时我怎么想得到啊
sin(5θ/2)*cos(θ/2)怎么化成sin(5θ/2+θ/2)+sin(5θ/2-θ/2)
逆向化间,很简单,你试试.嗯,试出来了。但做题时我怎么想得到啊