1.

If \({\sin ^2}A{\rm{\;}} + {\sin ^2}B = \frac{1}{{16}}\), then what is the value of \(\left( {{{\cos }^2}A{{\cos }^2}B - {{\sin }^2}A{{\sin }^2}B} \right)\)?

A. 11/16
B. 15/16
C. 17/16
D. 13/16
Answer» C. 17/16


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