[" 16."],[(1)/(tan3A-tan A)-(1)/(cot3A-cot A)=k cot2A rArr k=],[[" 1) "4," 2) "3," 3) "2]]

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1/(tan3A-tan A)-1/(cot 3A-cot A)=

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

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

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

Prove that (1)/(tan3A-tan a)-(1)/(cot3A-cot A)=cot2A

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

Prove that (1)/(tan 3A - tan A) - (1)/(cot 3A - cot A) = cot 2A .

Show that : 1/(tan 3A-tanA) - 1/(cot 3A - cot A) = cot 2A

Prove the following : 1/(tan3A-tanA)-1/(cot3A-cotA) = cot2A

(1)/(tan3 alpha-tan alpha)-(1)/(cot3 alpha-cot alpha)=cot2 alpha