RRB NTPC · Question 52

If \(sin\;x = \frac{4}{5}\) then sec^2 x – 1 = ? A. \(\frac{{16}}{{25}}\) B. \(\frac{{25}}{{9}}\) C.\(\frac{{9}}{{16}}\) D. \(\frac{{16}}{{9}}\)

1. A

   A

2. B

   D

3. C

   B

4. D

   C