Question

if cos squared theta minus 3 cos theta + 2 upon sin square theta is equal to 2 find Theta

Answer 1

cosA^2-3cosA+2 =2(sinA^2) so add two cosA ^2 on both sides then 3(cosA^2)-3cosA+2 =2 hence cosA=0 or 1 therefore A=90 degrees or 0 degrees

Answer 2

I think it is 240 degree....not sure