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    Hi, I'm doing M2 on friday, but as I'm doing it as an AS fmaths module I haven't done C3 yet but I know some of the trig identities in C3 are needed
    I thought it was only really 1 + tan^2 = sec^2 that was needed, (on top of C2 trig identities) but in one of the solomon papers I saw that 2sinxcosx = sin2x was used so I was wondering if someone could make me a list?
    Thanks
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    meep
 
 
 
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Updated: June 16, 2016
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