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OpenStudy (anonymous):
if A+B =225, prove that : cot A /1+cot A , Cot b/1+cot B =1/2
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OpenStudy (anonymous):
cot A /1+cot A???
OpenStudy (anonymous):
if cotA/(1+cotA) =1/2 cosA/(sinA+cosA) =1/2 tanA=1 similarly tanB=1
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