(tan10°-√3 ) /csc40° =(tan10°-√3 )sin40°
=2[(1/2)sin 10°-(√3/2)cos10°]sin40°/cos10°
=-2sin50°sin40°/cos10°
=-2cos40°*sin40°/cos10°
=-2.
(tan10°-√3 ) /csc40° =(tan10°-√3 )sin40°
=2[(1/2)sin 10°-(√3/2)cos10°]sin40°/cos10°
=-2sin50°sin40°/cos10°
=-2cos40°*sin40°/cos10°
=-2.