化简:sin50度(1+根号3*tan10度) - 知识问答

化简:sin50度(1+根号3*tan10度)

1个回答

sin50(1+√3tan10)
=sin50(cos10+√3sin10)/cos10
=sin50*2sin(10+30)/cos10
=2sin50sin40/cos10
=2sin50cos50/cos10
=sin100/cos10
=sin80/cos10
=cos10/cos10
=1

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