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Use Pythagoras theorem

I think that is a) \(\sqrt{33}/4\)

urg I couldn't figure out if it was a or c because I wasn't sure if 4 or 7 should be the denominator

cot B = \(\frac{1}{tanB}\) right ?

tan B = opposite/adjacent
opposite = 4
adjacent = ???
We will find adj. by pythagoras theorem

did it help @rebeccaskell94 ?

Yes! Very much so. I'm writing it down now so I remember the basic idea :) Thank you so much!

Nice to hear that @rebeccaskell94 :)