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4. The possible values of de (0, ) such ...

4. The possible values of de (0, ) such thatsin 0 + sin 40 +sin 70 = 0 are[2011]a 2T = 4ཀ ཀ 37 89»4?92*49(b\T 5ཀ ཀ 2 37 874 12?2^@ 34 ）(༩) 2T = T 27 3n 357?4*2?3་་362T = T 2 37 87༣་༣་

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