SOLUTION: if CosA+SinA=1, show that CosA-SinA=�1

Question 959308: if CosA+SinA=1, show that CosA-SinA=�1

Answer by Edwin McCravy(20056) (Show Source): You can put this solution on YOUR website!
if CosA+SinA=1, show that CosA-SinA=�1

, which is given:

Square both sides:










 


If n is even,  and , then 

If n is odd,   and , then 

Edwin

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