化简求值√3sin50°(1+√3tan10°)
√3sin50°(1+√3tan10°)
sin50°(1+√3tan10°) =sin(60°-10°)(1+√3tan10°) =(√3cos10°-sin10°)(1+√3tan10°)/2 =[√3cos10°-sin10°+3sin10°-√3(sin10°)^2/cos10°]/2 =[√3(cos10°)^2-√3(sin10°)^2+2sin10°cos10°]/2cos10° =(√3cos20°+sin20°)/2cos10° =(cos30°cos20°+sin30°sin20°)/cos10° =[cos(30°-20°)]/cos10° =cos10°/cos10°=1 所以√3sin50°(1+√3tan10°=√3