EM-1399

Sine rule

E Math · Secondary 3 · Hard · Sine rule

In

\triangle ABC

,

\angle A = 40^\circ

,

\angle B = 65^\circ

and side

a = BC = 9\text{ cm}

. Using the Sine Rule, find the length of side

b = AC

.

12.4 cm
7.0 cm
8.4 cm
15.9 cm

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