Math, asked by divyabharathi, 1 year ago

A+B = 45
show that
(cotA-1)(cotB-1)=2
deduce the value of cot22 1/2 degree.

Answers

Answered by Anonymous

2

cot (A+B)=1

cotA+cotB÷1-cotA.cotB=1

cotA+cotB=1-cotA.cotB

cotA.cotB- cotA-cotB+1=2

(cotA-1) (cotB-1)=2

Anonymous: please mark it as brainliest.

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