In the diagram, $AB = 6$ cm, $BC = 4$ cm and $AC = 5$ cm. Without finding any angle, calculate

Question

In the diagram, $AB = 6$ cm, $BC = 4$ cm and $AC = 5$ cm. Without finding any angle, calculate the value of $\cos C$. the value of ratio $\frac{\sin A}{\sin C}$. find $\sin B$ if the area of $\Delta ABC = 9.9\text{ cm}^2$.

Accepted Answer

(i) $\frac18$ (ii) $\frac23$ (iii) $0.825$

IP2U12 Exercise Trigonometry II (also for 3EM U7 Worksheet) Q7

IP2U12 Exercise Trigonometry II (also for 3EM U7 Worksheet) Q7

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