If cosQ-sinQ=1 then prove that cosQ+sinQ=1
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cos(0)=1
sin(0)=0
let q=0
cos0 -sin0=1
then
cos0 +sin0 =
1+0=1
sin(0)=0
let q=0
cos0 -sin0=1
then
cos0 +sin0 =
1+0=1
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