Math, asked by namannagpal, 1 year ago

If CosecA - SinA= root 5, then find the value of CosecA + SinA.

Anonymous: is the answer zeroo????????

namannagpal: 1 min

namannagpal: Answer is 9

Anonymous: just wait

namannagpal: You get the answer

Anonymous: actually i checked the answer the answer is 3

Anonymous: i did it and checked it

Anonymous: the fineal answer is 3

namannagpal: Thanks

Anonymous: u r welcome is the answer correct

Answers

Answered by Anonymous

cosecA-sinA=√5...........(1)
cosecA+sinA=x.........(2)

cosecA-sinA=√5
cosecA+sinA=x
----------------------------
2cosecA =√5+x..............(3)

cosecA-sinA=√5
cosecA+sinA=x
-----------------------------------
-2sina=√5-x...........(4)

(3)×(4)

2cosecA×(-2sinA)=(√5+x)×(√5-x)
-(2×2)cosecAsinA=(√5)²-(x)²
-4cosecAsinA=5-x²
-4=5-x²
x²-4-5=0
x²-9=0
x=√9
x=3

krishna1919: GOOD

Anonymous: thanks

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