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**Soroban** Hello, stephie!

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That decimal looks suspiciously like √10.

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. . . . . . . . . . . . . . . √10 . - . hyp

We have: . csc A .= .------ .= .-----

. . . . . . . . . . . . . . . . 1 . - . . opp

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Hence, A is an angle in a right triangle with: .hyp = √10 and opp = 1.

Using Pythagorus, we find that: .adj = 3

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. . . . . . . . . . . . . . . .hyp . . . √10

Therefore: . sec A .= .----- .= .-----

. . . . . . . . . . . . . - . .adj . . . . .3