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n ( ), /.
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w =2π/. (2)
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S1 : w, :
S1= w (r + r). (4)
(3) (4), :
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(6) , S= w (r - r), : w (r - r) = 2πr + w (r - r). (7)
(5)
w (r - r) = w (r + r) + w (r - r). (8)
w . :
w = w (r - r)/2 r = 1/2 w(1- r/ r). (9)
(9) α = 0, .. .
w =1/2 w[1- (r/ r) os α] (10)
w (5)
= 2πr/ w (r + r) (11)
(2) (11)
w= 2 π/ = 2 π w (r + r)/ 2πr = w(1+ r/ r). (12)
α .
w= w[1+ (r/ r) os α] (13)
(13) (10) w:
w= w[1+ (r/ r) os α] = 1/2 w[1- (r/ r) os α] [1+ (r/ r) os α] =
= 1/2 w (r/ r) [1- (r2 / r2 ) os2 α] (14)
w. w . , . 62 , 1 , w.
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w = w Z = 1/2 w[1- (r/ r) os α] Z, (15)
Z .
1' . 62 , w- w , .. 1' .
w= (w- w ) Z (16)
(16) w (9) :
w= (w- w ) Z= {w- 1/2w [1- (r/ r) os α]} Z = [ w- 1/2w+1/2w(r/ r) os α] Z = [1/2w+ 1/2w (r/ r) os α] Z =1/2w [1+ (r/ r) os α] Z. (17)
, , :.
1. w= 1/2w [1- (r/ r) os α];
2. w= 2pn/60;
3. w= 1/2w(r/ r) [1- (r2 / r2 ) os2 α];
4. w = 1/2 w[1- (r/ r) os α] Z;
5. w= 1/2w [1+ (r/ r) os α] Z.
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