1.

What is the value of \(\frac{1}{{{{\sin }^4}\left( {90 - \theta } \right)}} + \frac{1}{{\left[ {{{\cos }^2}\left( {90 - \theta } \right)} \right] - 1}}?\)

A. tan2θsec2θ
B. sec4θ
C. tan4θ
D. tan2θsin2θ
Answer» B. sec4θ


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