Prove that cotxcot2x-cot2xcot3x-cot3xcotx=1 | class 11th math chapter 3 exercise 3.3

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Prove that cotxcot2x-cot2xcot3x-cot3xcotx=1 | class 11th math chapter 3 exercise 3.3



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Prove that cotxcot2x-cot2xcot3x-cot3xcotx=1
class 11th math
chapter 3 exercise 3.3