化简:2sin50°+sin10°/cos10°
问题描述:
化简:2sin50°+sin10°/cos10°
答
2sin50°+sin10°=2sin(60°-10°)+sin10°
=2sin60cos10-2cos60sin10+sin10
=√3cos10
所以 (2sin50°+sin10°)/cos10°=√3