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What is the size of angle x in the diagram - WAEC Mathematics 2003 Question

What is the size of angle x in the diagram
A
15o
B
30o
C
45o
D
60o
correct option: b

(Sin\theta^{\circ} = \frac{opp}{hyp}<br /> Sin X^{\circ}=\frac{5}{10}=0.5000\SinX^{\circ}<br /> X^{\circ} = sin^{-1}0.5000<br /> X^{\circ}=30^{\circ})

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