Pre-Calculus

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How do I answer any...

How do I answer any trig identity? I have learnt all the formulas, but I still can't solve some identities. So my question is how do i answer any trig identity? please help.

I want an answer ASAP as my exam is tomorrow. Please give me an easy strategy or something, my friend doesn't even practice that much and he's good at it as well. Thank!

I want an answer ASAP as my exam is tomorrow. Please give me an easy strategy or something, my friend doesn't even practice that much and he's good at it as well. Thank!

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