Răspunsuri

2014-08-13T11:00:49+03:00
1. sin 60 =  \frac{ \sqrt{3} }{2}   

   ctg 30 =  \sqrt{3}

   cos 30 =  \frac{ \sqrt{3} }{2}

   tg 60 =  \sqrt{3}

 \frac{ \sqrt{3} }{2} ×  \sqrt{3} +  \frac{ \sqrt{3} }{2}  ×  \sqrt{3} =

 \frac{3}{2} +  \frac{3}{2} =

 \frac{6}{2} = 3.

2.  \frac{ \sqrt{3} }{2}  ×  \frac{1}{ \sqrt{3} } +  \frac{ \sqrt{3} }{2} ×  \frac{1}{ \sqrt{3} } =

    \frac{ \sqrt{3} }{ 2\sqrt{3} } +  \frac{ \sqrt{3} }{ 2\sqrt{3} } =

    \frac{1}{2} +  \frac{1}{2} =

    \frac{2}{2} = 1.