Triangle $ABC$ has $BC=8$ cm, $AC=10$ cm and $\angle BAC=40^\circ$. Find all possible v

Question

Triangle $ABC$ has $BC=8$ cm, $AC=10$ cm and $\angle BAC=40^\circ$. Find all possible values of $\angle ABC$, correct to 1 decimal place, and show that each is valid.[4]

Accepted Answer

$53.5^\circ$ or $126.5^\circ$; both leave a positive third angle.

Checking both possible angles

Checking both possible angles

Solution:

Solution locked