If $${\text{co}}{{\text{s}}^4}\theta - {\sin ^4}\theta = \frac{2}{3},$$ th

Question

If $${\text{co}}{{\text{s}}^4}\theta - {\sin ^4}\theta = \frac{2}{3},$$ then the value of $${\text{1}} - {\text{2}}{\sin ^2}\theta $$ is?

Options:

A . $$\frac{4}{3}$$

B . 0

C . $$\frac{2}{3}$$

D . $$\frac{1}{3}$$

Answer: Option C

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