化简sin(60°+2x)*cos(60°-2x)
问题描述:
化简sin(60°+2x)*cos(60°-2x)
答
sin(60°+2x)*cos(60°-2x)
=1/2(sin(60°+2x+60°-2x)+sin(60°+2x-(60°-2x))
=1/2(sin120°+sin4x)
=1/2(√3/2+sin4x)