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Prove the following identity: cot A+cot(...

Prove the following identity: `cot A+cot(60^0+A)+cot(120^0+A)=3cot3A`

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Prove the following identity: cot A+cot(60^(@)+A)+cot(120^(@)+A)=3cot3A

Prove that: cotA+"cot"(60^0+A)-cot(60^0-A)=3cot3A

Prove that: cotA+"cot"(60^0+A)-cot(60^0-A)=3cot3A

cot A + cot (60^(@) + A) + cot (120^(@) +A) = 3 cot 3 A.

Prove the following identities : cosec A + cot A = (1)/ (cosec A - cot A)

Prove the following identities: (tan A)/(1-cot A)+(cot A)/(1-tan A)=1+tan A+cot A=1+sec A cos ecA

Prove that: cot A+cot(60^(@)+A)-cot(60^(@)-A)=3cot3A

Prove the following identities : (cot A)/(1 - tan A) + (tan A)/(1- cot A) = 1 + tan A + cot A

Prove the following identities : ((cosec A - cot A)^(2) + 1)/(sec A (cosec A - cot A)) = 2 cot A

Prove the following : cot3A = (cot^3A-3cotA)/(3cot^2A-1)