นิพจน์ 12: left parenthesis, "c" Subscript, 1 , Baseline minus "R" Subscript, 2 , Baseline "t" , "c" Subscript, 2 , Baseline plus "R" Subscript, 1 , Baseline "t" , right parenthesisc1−R2t,c2+R1t
12
นิพจน์ 13: left parenthesis, "r" Subscript, 1 , Baseline minus "R" Subscript, 2 , Baseline "t" , "r" Subscript, 2 , Baseline plus "R" Subscript, 1 , Baseline "t" , right parenthesisr1−R2t,r2+R1t
13
นิพจน์ 14: left parenthesis, "r" Subscript, 1 , Baseline , "r" Subscript, 2 , Baseline plus left parenthesis, StartFraction, "R" Subscript, 1 , Baseline left parenthesis, "c" Subscript, 1 , Baseline minus "r" Subscript, 1 , Baseline , right parenthesis plus "R" Subscript, 2 , Baseline left parenthesis, "c" Subscript, 2 , Baseline minus "r" Subscript, 2 , Baseline , right parenthesis Over "R" Subscript, 2 , Baseline , EndFraction , right parenthesis "t" , right parenthesisr1,r2+R1c1−r1+R2c2−r2R2t
14
Punkter
ซ่อนโฟลเดอร์นี้จากนักเรียน
15
นิพจน์ 16: left parenthesis, "c" Subscript, 1 , Baseline , "c" Subscript, 2 , Baseline , right parenthesisc1,c2
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นิพจน์ 17: left parenthesis, "c" Subscript, 1 , Baseline plus "R" times cos alpha , "c" Subscript, 2 , Baseline plus "R" times sin alpha , right parenthesisc1+R·cosα,c2+R·sinα
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นิพจน์ 18: "r" Subscript, 1 , Baseline equals "c" Subscript, 1 , Baseline plus "R" times cosine alphar1=c1+R·cosα
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นิพจน์ 19: "r" Subscript, 2 , Baseline equals "c" Subscript, 2 , Baseline plus "R" times sine alphar2=c2+R·sinα