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How would you work it from here?
Are there any "more basic" ways you whould attempt doing it. Or without using that specific formula. IDK what I am asking. Maybe he didn't teach us that because its only a Pre-Cal class.
It's a standard trig identity yes.
Its funny he has never shown us that formula sinAsinB = 1/2(cos(A-B) - cos(A+B)). Is it a given?
Not a problem. Mostly all you have to do is work backwards:
darn that is great. However he said it could be proven in 4-5 steps by only working the left side.... Not to be picky, but you wouldn't happen to know how do do it like that?
You can use the identities. The words he really used were varifying Trigonometric Idenities. "Proving" that one side equals the other side, or the working of one side to equal the other.
The title is "Proving an Idenity" so does this mean you are not allowed to use trig identities? As that would be begging the question.
My Pre-Cal teacher gave us this problem today. I have worked on it for a very long time and have goten no where. I was wondering if anyone had any ideas.