cosx-sinx=1 general solution
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cos x -sin x =1 => π/2-sinx-sinx=1. =>2sinx=π/2-1. => sinx=π/2-1divided by 2
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sin^2x+cos^2x=1
or(sinx-cosx)^2+2sinxcosx=1
or, 1+2sinxcosx=1
or,2sinxcosx=0
or,sinxcosx=0
or,sinx=sin0°
or,x=0°
OR,cosx=0
or,cosx=cos90°
or,x=90°
or(sinx-cosx)^2+2sinxcosx=1
or, 1+2sinxcosx=1
or,2sinxcosx=0
or,sinxcosx=0
or,sinx=sin0°
or,x=0°
OR,cosx=0
or,cosx=cos90°
or,x=90°
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above answer is absolutely correct
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