\begin { equation } \begin{array}{l}{\text { Prove the following ident – InterviewSolution

1.	\begin { equation } \begin{array}{l}{\text { Prove the following identity: }} \\ {\sin ^{4} A+\cos ^{4} A=1-2 \sin ^{2} A \cos ^{2} A}\end{array} \end { equation }
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