# If tan A=cot (A-18^(@)) where 2A is an acute angle , find the value of A.

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If tan A=cot (A-18^(@)) where 2A is an acute angle , find the value of A.

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tan2A=cot(A-18^(@))
rArrcot(90^(@)-2A)=cot(A-18^(@))rArr90^(@)-2A=A-18^(@)
rArr108^(@)=3ArArrA=36^(@)