Question

化简tan175度+tan765度+tan(-300度)+tan（-690度）+tan1080度

Answer 1

tan175°+tan765°+tan(-300°)+tan(-690°)+tan1080°

= tan(180-5) + tan(720+45) + tan(-300+360) + tan(-690+720) +tan (3*360)

= -tan5 + tan45 + tan 60 + tan 30 +0

= -tan5º+1+√3 + √3/3