In the diagram above, < PRQ = 90º, < QPR = 30º and |PQ| = 10 cm. Find y
Attached Figure / Diagram
A
6cm
B
4cm
C
5cm
D
3cm
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
From the figure, sin 30^\circ = \(\frac{\text{y}}{10}\)
∴ 10 \times sin 30^\circ = y
y = (10 \times \(\frac{1}{2}\)) = 5 cm
Source: WAEC / JAMB / NECO Classroom Archive (Record #75911)