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Answer:
The answer is (a) ⇒ tanx = sinx/cosx
Explanation:
∵ (sinx)(cosx)(tanx) = (sinx)(cosx)(sinx/cosx) = sin²x
∵ sin²x = 1-cos²x
∴ L.H.S = R.H.S
∴ (sinx)(cosx)(tanx) = 1 - cos²x
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