Math, asked by baralsadikshya2007, 2 months ago

if A + B = 45 then prove:
( 1 + cotA) (1 + cotB) = 2cotBcotA​

Answers

Answered by Anonymous
2

Answer:

hope it helps

Step-by-step explanation:

Solution

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Correct option is A)

Given A+B=45  

 

⟹cot(A+B)=cot45  

 

⟹  

cotA+cotB

cotAcotB−1

=1

⟹cotA+cotB−cotAcotB=−1

⟹cotA+cotB−cotAcotB−1=−2

⟹cotA(1−cotB)−(1−cotB)=−2

⟹(cotA−1)(1−cotB)=−2

⟹(cotA−1)(cotB−1)=2

So m=2

Answered by oa175186
0

Answer:

Step-by-step explanation:

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