10sinxcosx+8sin²x=0/cos²x
10tgx+8tg²x=0
tgx(10+8tgx)=0
tgx=0⇒x=πn,n∈z
tgx=-1,25⇒x=-arctg1,25+πk,k∈z
√366-√166+ 2√6 = √366-√166+√24 = <span>√224</span>
-x+3y=13
6y-2x=-2 /:(-2)
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-x+3y=13
x-3y=1 /+
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0.x+0.y=14
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