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Always remember that cot & tan are compliment to each other So tan ɵ = cot( 90-ɵ) So it is given that cot8A = tan(A+8˚) Hence 8A + A+8˚= 90˚ So 9A+8˚ = 90˚ or 9A = 90˚-8˚=72˚ or A = 
= 8˚
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COGENT
