1.

If a2 sec2x - b2 tan2x = c2, then the value of sec2x + tan2x is equal to (assume b2 ≠ a2)

A. $\frac{{{b^2} - {a^2} + 2{c^2}}}{{{b^2} + {a^2}}}$$
B. $\frac{{{b^2} + {a^2} - 2{c^2}}}{{{b^2} - {a^2}}}$$
C. $\frac{{{b^2} - {a^2} - 2{c^2}}}{{{b^2} + {a^2}}}$$
D. $\frac{{{b^2} - {a^2}}}{{{b^2} + {a^2} + 2{c^2}}}$$
Answer» C. $\frac{{{b^2} - {a^2} - 2{c^2}}}{{{b^2} + {a^2}}}$$


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