IfA+B=135find. ,(1+cotA)(1+cotB).??? give me the answer please
Rishav Kumar , 8 Years ago
Grade 11
Trigonometry> IfA+B=135find. ,(1+cotA)(1+cotB).??? give...
1 Answerspoojitha
Last Activity: 7 Years ago
A+B=135,cot(A+B)=cot135,(cotB-cotA)/(1+cotA.cotB)=-1, 1+cotA.cotB=cotA-cotB , (1+cotA).(1+cotB)=1+cotA+cotB+cotA.cotB=(1+cotA.cotB)+cotA+cotB=cotA-cotB+cotA+cotB=2cotA
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