To find: \(\lim\limits_{\text x \to0}\cfrac{cos\,3\text x-cos\,5\text x}{\text x^2} \)
We know,
Therefore,
Multiplying and dividing by 10:
Formula used:
= 8 × 1
= 8
Hence, the value of \(\lim\limits_{\text x \to0}\cfrac{cos\,3\text x-cos\,5\text x}{\text x^2} \) = 8