In the diagram, $PQR$ is a straight line, $\angle QRS = 90^\circ$, $QS = 13$ cm and $QR = 5$

Question

In the diagram, $PQR$ is a straight line, $\angle QRS = 90^\circ$, $QS = 13$ cm and $QR = 5$ cm. Write $\cos x$ as a fraction. Find $y$.

Accepted Answer

(i) $-\frac5{13}$ (ii) $22.6^\circ$

IP2U12 Exercise Trigonometry II (also for 3EM U7 Worksheet) Q3