trygonometria, podpunkty w zalaczniku (obrazek) :)
6.1
a) sin alfa = 3/5
cos alfa = 4/5
tg alfa = 3/4
ctg alfa = 4/3
b) obliczam 3 bok trójkąta z tw. Pitagorasa:
a^2+b^2=c^2
5^2+12^2=c^2 => c^2=169 =>c=13
sin alfa = 5/13
cos alfa = 12/13
tg alfa = 5/12
ctg alfa = 12/5
c) analogicznie obliczam wartość 3 boku:
c=pierwiastek z 353
sin alfa = 8/17
cos alfa = pierw.353/17
tg alfa = 8/pierw.353 = 8pierw.353/353
ctg alfa = pierw.353/8
6.2
a) tg 24 stopni = x/20
0,4452=x/20
x=8.9cm
b) cos 20 stopni = x/15
0.9397 = x/15
x=14.1cm
c) sin 65 stopni = x/20
0.9063 = x/20
x=18.1cm
6.3
sin 32 stopni = h/6
0.5299 = h/6
h=3.2cm
1a)
sinα = 3/5
cosα = 4/5
tgα = 3/4
ctgα = 4/3
b)
Z Twierdzenia Pitagorasa:
a²+b² = c²
5²+12² = c²
25+144 = c²
c² = 169
c = √169
c = 13
sinα = 12/13
cosα = 5/13
tgα = 12/5
ctgα = 5/12
c).
8²+b² = 17²
64+b² = 289
b² = 289-64
b² = 225
b = √225
b = 15
sin∞ = 8/17
cos∞ = 15/17
tg∞ = 8/15
ctg∞ = 15/8
2a)
sin24° = x/20 /·20
0,4067·20 = x
x = 8,134
x ≈ 8,1
cos20° = x/15 /·15
0,9397·15 = x
x = 14,0955
x ≈ 14,1
c)
sin65° = x/10 /·10
0,9063·10 = x
x = 9,063
x ≈ 9,1
3.
sin32° = h/6 /·6
0,5299·6 = h
h = 3,1794
h ≈ 3,2
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6.1
a) sin alfa = 3/5
cos alfa = 4/5
tg alfa = 3/4
ctg alfa = 4/3
b) obliczam 3 bok trójkąta z tw. Pitagorasa:
a^2+b^2=c^2
5^2+12^2=c^2 => c^2=169 =>c=13
sin alfa = 5/13
cos alfa = 12/13
tg alfa = 5/12
ctg alfa = 12/5
c) analogicznie obliczam wartość 3 boku:
c=pierwiastek z 353
sin alfa = 8/17
cos alfa = pierw.353/17
tg alfa = 8/pierw.353 = 8pierw.353/353
ctg alfa = pierw.353/8
6.2
a) tg 24 stopni = x/20
0,4452=x/20
x=8.9cm
b) cos 20 stopni = x/15
0.9397 = x/15
x=14.1cm
c) sin 65 stopni = x/20
0.9063 = x/20
x=18.1cm
6.3
sin 32 stopni = h/6
0.5299 = h/6
h=3.2cm
1a)
sinα = 3/5
cosα = 4/5
tgα = 3/4
ctgα = 4/3
b)
Z Twierdzenia Pitagorasa:
a²+b² = c²
5²+12² = c²
25+144 = c²
c² = 169
c = √169
c = 13
sinα = 12/13
cosα = 5/13
tgα = 12/5
ctgα = 5/12
c).
8²+b² = 17²
64+b² = 289
b² = 289-64
b² = 225
b = √225
b = 15
sin∞ = 8/17
cos∞ = 15/17
tg∞ = 8/15
ctg∞ = 15/8
2a)
sin24° = x/20 /·20
0,4067·20 = x
x = 8,134
x ≈ 8,1
b)
cos20° = x/15 /·15
0,9397·15 = x
x = 14,0955
x ≈ 14,1
c)
sin65° = x/10 /·10
0,9063·10 = x
x = 9,063
x ≈ 9,1
3.
sin32° = h/6 /·6
0,5299·6 = h
h = 3,1794
h ≈ 3,2