Question
Verify the Identity.$$\tan ^{4} k-\sec ^{4} k=1-2 \sec ^{2} k$$
Step 1
Step 1: We start with the left-hand side of the equation: $$\tan ^{4} k-\sec ^{4} k$$ We can rewrite this as: $$(\tan^{2}k)^{2} - (\sec^{2}k)^{2}$$ Show more…
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