Question

помогиииите 33 корень из 2 cos (495 градусов)

Answer 1

$33sqrt2cdot cos495^0=33sqrt2cdot cos(360^0+135^0)=\\=33sqrt2cdot cos135^0=33sqrt2cdot cos(180^0-45^0)=\\=33sqrt2cdot (-cos45^0)=-33sqrt2cdot frac{sqrt2}{2}=-33$