SSC Selection Post 2022 PYQ — Question 71

The correct answer is option 4 i.e. $24\over25$.

According to the given diagram, cosθ = AB/BC

Using Pythagoras theorem, BC² = AB² + AC²

⇒ 25² = AB² + 7²

⇒ AB² = 625 - 49

⇒ AB² = 576

⇒ AB = 24 

Now, cosθ = 24/25