Question
Let $A=\sin ^{4} \theta+\cos ^{4} \theta$, then find $A$
Step 1
Step 1: First, we can rewrite the expression $A=\sin ^{4} \theta+\cos ^{4} \theta$ as $A=(\sin ^{2} \theta+\cos ^{2} \theta)^{2}-2\sin ^{2} \theta \cos ^{2} \theta$. Show more…
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Key Concepts
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