(2sin10°+sin50°)÷cos50°

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(2sin10°+sin50°)÷cos50°(2sin10°+sin50°)÷cos50°(2sin10°+sin50°)÷cos50°sin10°=sin(60°-50°)=sin60cos50-

(2sin10°+sin50°)÷cos50°
(2sin10°+sin50°)÷cos50°

(2sin10°+sin50°)÷cos50°
sin10°=sin(60°-50°)=sin60cos50-cos60shin50=√3/2cos50°-1/2sin50°
(2sin10°+sin50°)÷cos50°
=(√3cos50°-sin50°+sin50°)÷cos50°
=√3