if cot A+1/COT A=1 ,FIND COT2A +1/COT2A
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givencotA+1/cotA=2
let x=cotA
then x+1/x=2
squaring on both sides we get
x2+1/x2+2=4
so x2+1/x2=2
substituting x=cotA in above expression we get
cot2A+1/cot2A=2
let x=cotA
then x+1/x=2
squaring on both sides we get
x2+1/x2+2=4
so x2+1/x2=2
substituting x=cotA in above expression we get
cot2A+1/cot2A=2
mktmanagerspc:
BUT GIVEN ANSWER = -1
the given answer is not -1 it is we have to prove that as 2
I AM SURE THAT ANSWER IS -1
YOU CAN DO WRITE WAY BUT YOU CANNOT READ QUESTION CAREFULLY IN QUESTION 1 IS GIVEN BUT YOU CAN 2
YOU CAN TAKE 2
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