2019 June(B02) Math Question 53

Trigonometry

- Advanced sin, cos, tan functions

53. A forest fire is contained within a triangular region,
 which is shown below. The supervising firefighter plans
to fight the fire by positioning a firefighter about every
4 meters along the perimeter of the triangle. Among the
following, which expression best estimates the planned
number of firefighters along the perimeter? ·
(Note: The law of sines states that in every triangle, the
3 ratios of length of a side to the sine of the angle
opposite that side are equal.)

Choice A

53. A forest fire is contained within a triangular region,
 which is shown below. The supervising firefighter plans
to fight the fire by positioning a firefighter about every
4 meters along the perimeter of the triangle. Among the
following, which expression best estimates the planned
number of firefighters along the perimeter? ·
(Note: The law of sines states that in every triangle, the
3 ratios of length of a side to the sine of the angle
opposite that side are equal.)

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