化简求值:8sin15°cos15°cos30°cos60°
问题描述:
化简求值:8sin15°cos15°cos30°cos60°
答
8sin15°cos15°cos30°cos60°
=4(2sin15°cos15°)cos30°cos60°
=4sin30°cos30°cos60°
= 4(1/2)(√3/2)(1/2)
=√3/2