ABC , b, , , (. 40). , ,

2 = b2 + 2 2bc cosA. (5.44)

,

dA= (5.45)

 

hA , ;

 

 

hA = csinB = bsinC= sin A. (5.46)

(5.45) ,

 

(5.47)

(5.47) , , ( , ).

ABC hB hc b , , (5.47), 젠 .

 

(5.48)

. 40.

 

  a = b = c s, cosA= cos = = cos = 0,50; hA = hB = hc = ssin 60 = s. , . . = = =S, mb (b=A; ; ), ,

(5.49)

b mb,

(5.50)

堠 - -

1 2- , . . :

(5.51)

(5.52)

L ; N ; , ms .

1=200 , N = 16, s = 25 , m=1,0" ms/s= 1/300 000 ms=0,083 mL,=0,17 mq=1,18 .

M =

, 2 200X200 . - ( ) . . .

:

mt= 0,83ms; (5.53)

mr=l,20mS; (5.54)

U= (5.55)

s = 7-20 , ms/s= 1/300000 젠 mt = 2-6 ; = 3-8 ; U=4-10 .

:

(5.56)

 

 

(5.57)

 

L , , k; N (k£N); ms . L=180 , s=15 , N = k = 24, ms/s = 1/300 000 ms = 0,05 = 0,08 , /ng=0,46 , = = 0,47 . , . .