A \( \left(cos\right)^{- 1} \left(\right. \frac{3}{49} \left.\right) \)
B \( \left(cos\right)^{- 1} \left(\right. - \frac{3}{49} \left.\right) \)
C \( \left(cos\right)^{- 1} \left(\right. - \frac{3}{7} \left.\right) \)
D \( \left(cos\right)^{- 1} \left(\right. \frac{2}{7} \left.\right) \)