tan(-150°)cos(-570°)cos(-1140°)/cot(-240°)sin(-690°)
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tan(-150°)cos(-570°)cos(-1140°)/cot(-240°)sin(-690°)tan(-150°)cos(-570°)cos(-1140°)/cot(-240°)sin(-6
tan(-150°)cos(-570°)cos(-1140°)/cot(-240°)sin(-690°)
tan(-150°)cos(-570°)cos(-1140°)/cot(-240°)sin(-690°)
tan(-150°)cos(-570°)cos(-1140°)/cot(-240°)sin(-690°)
tan(-150°)cos(-570°)cos(-1140°)/cot(-240°)sin(-690°)
= tan(-150°)cos(150°)cos(-60°)/cot(120°)sin(30°)
= -tan(30°)cos(30°)cos(60°)/-cot(60°)sin(30°)
= sin(30°)cos(30°)cos(60°)sin(60°)/cos(30°)cos(60°)sin(30°)
= sin(60°)
= 根号3 / 2.
等于6分之根号3
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