A right-angled triangle has an angle of 60° and the side adjacent to this angle is 5 cm. What is the length of the hypotenuse?
Q1. A right-angled triangle has an angle of 60° and the side adjacent to this angle is 5 cm. What is the length of the hypotenuse?
Answer: 10 cm
Explanation: The cosine of 60° equals the ratio of the adjacent side to the hypotenuse. Since cos(60°) = 0.5, rearranging gives the hypotenuse as 5 / 0.5 = 10 cm, using the formula cos(angle) = adjacent/hypotenuse.