Question

need help!
cosx-sinex =1 for 0<= x<=360
i got answer like
x= 0 ,180,270
but only 0 and 270 are taken as roots of this equation . why 180 is discarded ?

Answer 1

\[\cos x-\sin x=1\]
put x=180
\[\cos 180-\sin 180=\]
\[-1-0=-1\ne 1\]

Answer 2

do you get this part?

Answer 3

yep !

Answer 4

so 180 is not an answer, right?

Answer 5

yah! now i got it !

Answer 6

thanks !

Answer 7

ok =)