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> Find $\lim\_{t\to 0} \frac{\cos(2t)-1}{\cos(t)-1}$.
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Of course, we can't have it in for $0/0$.
How would I solve this using limit Laws, please? Is there a way to solve this only using limit laws? I tried asking for help but they used L'hospital rule, but we haven't learnt that yet in class. I'm also not that great with trig Identities but I looked online to find the identity of $\cos(2t)-1$ and the identity of $\cos(t)-1$ to no avail. Am I forgetting a step?