38. Engineers are building a straight underwater pipeline from a drilling platform at P to an oil refinery located at R on a straight stretch of coastline, as shown on the map below. The distance from the platform to the refinery is 5.4 km, and the distance from the platform to the coastline is 3.7 km. Which of the following expressions gives the measure of the acute angle formed by the pipeline and the coastline?
Your Answer is
Correct Answer is K
Explanation
In this right-angle trigonometric function, we know the opposite side of the angle and the hypotenuse of the triangle, that is to say, we know the sin value of the angle, and the inverse trigonometric function of sin (the opposite side is compared to the hypotenuse) can give Our angle