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a=5cm
b=12cm
c=√a²+b²=√5²+12²=√25+144=√169=13cm
b)
α=55⁰
a=10cm
sinα=a/c
0,8192=10/c
c=10:0,8192
c=około 12,21cm
ctgα=b/a
0,7002=b/10
b=0,7002×10=7,002cm (około )
a=5
b=12
c^=a^+b^
c^=25+144
c=13
b)
alfa=55 stopni
b=10
sin(alfa)=b/c
sin55=0,82
82/100=10/c
82c=1000
c=12,2
c^=b^+a^
148,84=100+a^
a=7