Question

Pls look at pic before help out confused

Answer 1

Answer:

Option 4

Step-by-step explanation:

By the Pythagorean identity, and the fact we are in the first quadrant,

$\cos \theta=\frac{4}{5}$

Using the double angle formula for cosine,

$\cos 2\theta=2\cos^{2} \theta-1=2\left(\frac{4}{5} \right)^2 -1=\frac{7}{25}$