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DE?

dd''d?DE?sin(I?I)?sin(I1?I1') 11''cosI1cosI1' ÓÉͼ¿ÉÖª I1?? sinI1?sinI1sin?? nn cosI'1=

sin2?11?2=

nnn2?sin2?

d?'d''(sinIcosI?cosIsinI1111) 'cosI1dcosI1sinI1' =dsinI1? 'cosI1 =dsinI1(1?cosI1)

ncosI1' =dsin?(1?cos?n?sin?22)

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d D3 B2 D2 D1 B1 ¦Õ ¦Ø ¦Õ O ¦Õ A

OB1?

dd''d?OBsin(??I)?sin(??I1') 111''cosI1cosI1'' sin??nsinI1 d1?dsin??(1?cos?n?sin?22)

µ±Æ½Ðаåת¹ý¦Õ½Çʱ OD1?'dd?

sin(90??I1')cosI1'' d2?D1D2?OD1sin(I1?I1) I1???? sinI1?nsinI1 sinI1?'1''1sin(???) nsin2(???)12 cosI?1?=n?sin2(???) 2nn d2?'dsin(I1?sinI1') 'cosI1 =

d''(sinIcosI?cosIsinI1111) 'cosI1 =dsinI1(1?cosI1cos(???))?dsin(???)(1?)

22ncosI1'n?sin(???)

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