Answer:
Option (a) is correct.
Step-by-step explanation:
Given a right angled triangle with given dimensions.
We have to find an equation that can be used to solve for side c,
Consider the given triangle ABC,
We know for ∠B = 50° , we have perpendicular = 3 m and hypotenuse is c,
Trigonometric ratio that defines the relation between perpendicular and hypotenuse is Sine.
Using trigonometric ratio,



Thus, Option (a) is correct.