Suppose cos A = and tan B = where A is in the second quadrant and B is in the third quadrant. Find the exact values of: sin(A-B): tan(A-B):
any help much appreciated.
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Originally Posted by red_dog ahh yeah question how did u get from ?
EDIT: sorry i understand now
Originally Posted by red_dog sorry question how did u get 3rd quadrant is tan, yes but then u got another tan ontop where numerator is . why?
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