Răspunsuri

2014-08-21T19:16:12+03:00
Sin(x)²+cos(x)²=1
sin(x)²+4÷5²=1
sin(x)²=1-14÷25=9÷25
sin(x)=3÷5
1 4 1
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2014-08-21T19:16:49+03:00