If a,b,c and d are real numbers such that a^2 +b^2+c^2=d^2=1and if A=[\table\a+ib,\c+id;\-c+id,\a-ib]then A^{-1}=

Correct Answer is : [a−ib-c−idc−ida+ib]

[\table\a-ib,\c+id;\-c+id,a+ib]

[\table\a-ib,\-c-id;\c-id,a+ib]

[\table\a+ib,\c+id;\c-id,\a-ib]

[\table\a+ib,\-c-id;\c-id,\a-ib]

AP EAMCET Engineering 2014 Code A Solved Paper

Question : 4 of 160

Marks: +1, -0

If a,b,c and d are real numbers such that a2+b2+c2=d2=1and if A=[

a+ib	c+id
-c+id	a−ib

]then A−1=

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a−ib	-c−id
c−id	a+ib

a+ib	-c−id
c−id	a−ib

a−ib	-c−id
c−id	a+ib