For any two numbers theta and phi ...

For any two numbers `theta and phi ` , we define ` theta R phi ` if and only if ` sec^(2) theta - tan ^(2) phi =1 ` the relation R is -

A

Reflexive but not transitive

B

Symmetric but not reflexive

C

Both reflexive and symmetric but not transitive

D

At equivalence relation

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The correct Answer is:

D

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