Triangle $ABC$ is right-angled at $B$, with $AB=8$ cm and $AC=13$ cm. Find \(\theta=\angle B

Question

Triangle $ABC$ is right-angled at $B$, with $AB=8$ cm and $AC=13$ cm. Find $\theta=\angle BAC$, correct to 1 decimal place. $A$ $B$ $C$ $8\text{ cm}$ $13\text{ cm}$ $\theta$

Accepted Answer

$52.0^\circ$

Finding an angle using cosine

Finding an angle using cosine

Solution:

Solution locked