In the following questions, a question is followed by data in the form of two statements labelled as I and II. You must decide whether the data given in the statements are sufficient to answer the questions.

Question 2

What is the value of $$\cos^{2} \theta - \sin^{2} \theta$$?
I) $$\sin^{2} \theta = \frac{7}{25}$$
II) $$\theta$$ lies in first quadrant

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