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A : sqrt(1-sin^(2)100^@) sec 100^(@) =-1...

A : `sqrt(1-sin^(2)100^@) sec 100^(@) =-1`
R : ` sqrt(x^(2))=-x " if " x lt 0`

A

A is true, R is true and R is correct explanation of A

B

A is true, R is true and R is not correct explanation of A

C

A is true, R is false

D

A is false, R is true

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