If cottheta = frac(21)(20), then what is...

If `cottheta = frac(21)(20)`, then what is the value of `sectheta`?
(A) `frac(29)(21)` (B) `frac(21)(29)` (C) `frac(29)(20)` (D) `frac(20)(29)`

A

B

D

C

A

D

C

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