1.

If sin21° = $$\frac{x}{y}{\text{,}}$$then sec21° - sin69° is equal to?

A. $\frac{{{x^2}}}{{y\sqrt {{y^2} - {x^2}} }}$$
B. $\frac{{{y^2}}}{{x\sqrt {{y^2} - {x^2}} }}$$
C. $\frac{{{x^2}}}{{y\sqrt {{x^2} - {y^2}} }}$$
D. $\frac{{{y^2}}}{{x\sqrt {{x^2} - {y^2}} }}$$
Answer» B. $\frac{{{y^2}}}{{x\sqrt {{y^2} - {x^2}} }}$$


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