Pls solve 10th question
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Verified answer
A+B=45APPLYING COTANGENT ON BOTH SIDES
cot(A+B)=cot45
CotAcotB-1/CotA+cotB=1
CotAcotB-1= CotA+cotB
CotAcotB- CotA-cotB=1
adding 1 on both sides
CotAcotB- CotA-cotB+1=2
CotA(CotB-1)-1(cotB -1)=2
(CotA -1)(CotB-1)=2