1.

If A = sin2θ + cos4θ for any value of θ, then the value of A is?

A. ${\text{1}} \leqslant {\text{A}} \leqslant {\text{1}}$$
B. $\frac{3}{4} \leqslant {\text{A}} \leqslant {\text{1}}$$
C. $\frac{{13}}{{16}} \leqslant {\text{A}} \leqslant {\text{1}}$$
D. $\frac{3}{4} \leqslant {\text{A}} \leqslant \frac{{13}}{{16}}$$
Answer» C. $\frac{{13}}{{16}} \leqslant {\text{A}} \leqslant {\text{1}}$$


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