If cot A = tan ( n-1 ) A, find A
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GIVEN,
Cot A = tan (n-1) A , To find the value of A
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=> COT A = TAN(n-1 )A
cos A/sin A =sin(n-1)A/cos(n-1)A
cosA cos(n-1)A - sinAsin(n-1)A=0
cos(A + nA - A)=0
cos nA=0
cos nA = cospi/2
nA= pi/2
a= pi/2n
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