Page 55 - modul trigonometri_Neat
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√19
Obtained sin < = sin =
12
Look at the ACD triangle. CD= distance from the phone from the
highway
without <DAC =
√19
⇔ =
12 2000
√19 500
⇔ = × 2000 = √119 ≈ 1818,12
12 3
So, the distance of the mobile phone from the highway is about
1818.12 m.
Competency Test 4
1. Pay attention to the following image.;
R
12 cm 120° 15 cm
P Q
Specify:
a. Side PQ;
b. PQR triangle area.
2. A reconnaissance plane flew in the direction of the three-figure
major 060° with a distance of 40 km. Then, the pilot deflects the
direction of the plane so that the plane goes in the direction 090°.
In the new direction, the aircraft travels a distance 60√3 of km.
determine the distance of the aircraft from its first position.
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