prove that cotxcot2x+cot2xcot3x+2=cotx(cotx-cot3x)
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Answer:
cot3x+2=cotxcotxcot2
Step-by-step explanation:
cotxcot2x+cot2x
cot3x+2=cotxcotxcot2
x+cot2xcot3x+2=cotx
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