Odpowiedzi

2009-10-16T16:02:46+02:00
1) a= 18 cm b = 23cm c = 29,2 cm alfa= 38*2´,beta= 51*58´, gama 90* ( tgalfa = a/b-->alfa= tan-1 a/b, c= a/(sin alfa), beta= 90* - alfa )
2) a= 11cm b = 17.8 c = 21cm alfa 31*35´, beta = 58*25´, gama = 90*
( sin alfa = a/c --> alfa= sin-1 a/c , tg alfa = a/b--> b= a/(tgalfa), beta90* - alfa )
3) a = 22,7 cm b = 25,2 cm c = 34 cm, alfa 42*, beta 48*, gama90*
(sin alfa= a/c--> a= c x sin alfa, tg alfa = a/b--> b= a/tg alfa, beta = 90- alfa)
4)a = 45cm b = 57,6 cm c= 73,1 cm alfa 38* beta 52* gama 90*
(cos beta= a/c--> c= a/(cos beta) , sin beta = b/c--> b= sin beta x c )
2009-10-16T16:05:56+02:00
1) tgL=18/23
tgl=0,78
L=38
B=90-38 B=52
sin38=18/c
0,61=18/c
c=29,5
2)
sinL=11/21
sinL=0,52
L=31
B=90-31=59
tg31=11/b
0,6=11/b
b=18,3
3)
L=42
B=90-42=48
sin42=a/34
0,67=a/34
a=22,8
4)
B=52
L=90-52=38
sin38=4,5/c
0,62=4,5/c
c=7,3
tg38=4,5/b
0,78=4,5/b
b=5,8
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