sin(-π/6)=____;sin7π?6=_____;tan(-5π/6)=_____;sin11π/6=_____
问题描述:
sin(-π/6)=____;sin7π?6=_____;tan(-5π/6)=_____;sin11π/6=_____
答
-1/2
-1/2
根号3/3
-1/2