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SAT® Subject Test in Math 1 & 2

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Difficult

Applying the Conjugate

SATSTM-XVPECQ

Which one of the following is equivalent to $\cfrac{\text{cosy}}{1-\text{siny}}$?

A

$\text{cosy - coty}$

B

$\cfrac{1+\text{siny}}{\text{cosy}}$

C

$\text{tany}-1$

D

$\cfrac{1-\text{siny}}{\text{cosy}}$

E

$1-\text{tany}$