Respuesta :

Using the identity tan(θ) = sinθ / cosθ :-

cos (-θ) . tanθ  = cos(-θ) . sinθ / cosθ  

Now. cos(-θ) = cosθ

- so we see that the right side of the identity simplifies to sinθ  which completes the proof.

lemion

Answer:

Step-by-step explanation:

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