化简:[2sin50°+sin10°(1+根号3*tan10°)]*根号sin^280°
问题描述:
化简:[2sin50°+sin10°(1+根号3*tan10°)]*根号sin^280°
答
[2sin50+sin10(1+根号3*tan10) ]根号(sin^2(80))= [2sin50+sin10(1+根号3*sin10/cos10) ] sin80= [2sin50+sin10(1+根号3*sin10/cos10) ] cos10= 2sin50cos10 + sin10(cos10+根号3*sin10) = 2sin50cos10 + sin10 { 2...