sin50º(1+√3tan10º)化简

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sin50º(1+√3tan10º)化简
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sin50º(1+√3tan10º)化简
sin50º(1+√3tan10º)化简

sin50º(1+√3tan10º)化简
1+√3tan10°
=1+√3sin10°/cos10°
=(cos10°+√3sin10°)/cos10°
=2sin(10°+30°)/cos10°
=2sin40°/cos10°
sin50°(1+√3tan10°)
=(2sin40°sin50°)/cos10°
=[cos(50°-40°)-cos(50°+40°)]/cos10°
=cos10°/cos10°
=1