d. \( L=\lim _{x \rightarrow 0} \frac{2 \sin x-\sin 2 x}{2 \tan x-\tan 2 x} \)
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Step 1: Recall the double angle identities: \[ \sin 2x = 2 \sin x \cos x \] \[ \tan 2x = \frac{2 \tan x}{1 - \tan^2 x} \] Show more…
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