(1)/(tan3A+tan A)-(1)/(cot3A+cot A)=cot4A

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Show that: (1)/(tan3A-tan A)-(1)/(cot3A-cot A)=cot2A

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(1)/(tan 3 A - tan A)- (1)/(cot 3 A - cot A)= .............. A) tan A B) tan 2A C) cot A D) cot 2A

(1)/(tan 3 A - tan A)- (1)/(cot 3 A - cot A)=

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