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"Prove that " cotA + cot ( 60^(@) + A) +...

`"Prove that " cotA + cot ( 60^(@) + A) + cot (120^(@) + A) = 3 cot 3 A.`

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

Prove that cot theta + cot (60^(@) theta) + cot (120^(@) + theta) = 3 cot 3 theta .

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

Prove that cotA-tanA=2cot2A

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

Prove that: cot theta+cot(60^(@)+theta)+cot(120^(@)+theta)=3cot3 theta

Prove that: cot2A + tanA= cotA - cot 2A

Prove that: cot2A + tanA= cotA - cot 2A

Prove that cotA-cosec2A=cot2A

Show that: (cot 30^(@) cot 60^(@) - 1)/(cot 30^(@) + cot 60^(@)) = cot 90^(@)