Prove that : (CosA+SinA)²+(CosA-SinA)²=2
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Answered by
26
=cos²A+2cosAsinA+sin²A + cos²A-2sinAcosA+Sin²A
=Cos²A+Sin²A + Cos²A+Sin²A
=1 + 1
=2
Hope it helps...
Regards,
Leukonov.
=Cos²A+Sin²A + Cos²A+Sin²A
=1 + 1
=2
Hope it helps...
Regards,
Leukonov.
Answered by
11
i hope it will help u
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