1st one use power reducing formula
2nd 1 over the power reducing formula
3rd double angle with a sub 3x=2u
4th 1 over the double angle
5th and use trig identities (ones mentioned) to finish it
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Please drown me in your maginificence x]
I'm completely lost BTW. A few are proving identities, simplifying... but I am 100% lost :\ Any tips?
Also, please type the questions out. It is too inconvenient to have to open files and the questions can't be quoted.