求[2sin50°+sin10°(1+√3Tan10°)]√2sin平方80°=???
1个回答
展开全部
=2√2sin50cos10+√2sin10(cos10+√3sin10)
=2√2sin50cos10+2√2sin10(1/2cos10+√3/2sin10)
=2√2sin50cos10+2√2sin10(sin30cos10+cos30sin10)
=2√2sin50cos10+2√2sin10sin40
=2√2cos40cos10+2√2sin10sin40
=2√2(cos40cos10+sin40sin10)
=2√2cos30
=√6
=2√2sin50cos10+2√2sin10(1/2cos10+√3/2sin10)
=2√2sin50cos10+2√2sin10(sin30cos10+cos30sin10)
=2√2sin50cos10+2√2sin10sin40
=2√2cos40cos10+2√2sin10sin40
=2√2(cos40cos10+sin40sin10)
=2√2cos30
=√6
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询