Question 935737
{{{205}}} degrees is {{{180}}} degrees + {{{25}}} degrees, we can write cos as {{{cos(205)=cos(180)cos(25)}}}

{{{cos(205)=cos(180)cos(25)=-1*0.906307787=-0.906307787}}}

or, we can use only {{{-cos(25)}}} (it is {{{cos(25)}}} in III quadrant because {{{205}}} degrees angle is in that quadrant)


{{{cos(205)=-cos(25)=-0.906307787}}}