Question

√3( cos75° - cos15°) / 1-2sin^2 15 (оформлено дробью)

Answer 1

$frac{ sqrt{3} (cos75-cos15)}{1-2 sin^{2}15 }$=$frac{ sqrt{3} (-2sin90*sin60)}{1-1+cos30}$=$- frac{sqrt{3} *2*1* frac{sqrt{3} }{2} }{ frac{ sqrt{3} }{2} }$=$-2 sqrt{3}$