A) \[1+2\text{ }si{{n}^{2}}\theta \text{ }co{{s}^{2}}\theta \text{ }\]
B) \[2\text{ }si{{n}^{2}}\theta \text{ }co{{s}^{2}}\theta \text{ }-\text{ }1\]
C) \[1-2\text{ si}{{\text{n}}^{\text{2}}}\theta \text{ co}{{\text{s}}^{\text{2}}}\theta \]
D) \[3+2si{{n}^{2}}\theta \text{ }co{{s}^{2}}\theta \]
E) None of these
Correct Answer: C
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