In triangle $ABC$, $AB=9$ cm, $AC=10$ cm and $\angle BAC=52^\circ$. Calculate $BC$. Hence,

Question

In triangle $ABC$, $AB=9$ cm, $AC=10$ cm and $\angle BAC=52^\circ$. Calculate $BC$. Hence, calculate the smaller angle $ABC$, giving each answer correct to 3 significant figures.

Accepted Answer

(a) $8.377$ cm; (b) $70.159^\circ$.

Sec 3/4 E Math T06-Q06 - Solving a triangle using two trigonometric rules

Sec 3/4 E Math T06-Q06 - Solving a triangle using two trigonometric rules

Solution:

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