The following diagram shows a line representing the road and a circle representing the area covered by the tower's signal. Point R is on the circumference of the circle and points S and R are on the road. Point S is 38 km from the tower and RŜT = 43°. diagram not to scale 32 38 43 R Let SR = x. Use the cosine rule to show that x? – (76 cos 43')x + 420 = 0. 4b. Hence or otherwise, find the total distance along the road where the signal from the tower can reach cellular phones.
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It is given that communication tower T has a range of radius 32km.
Two points S and R such that:
(Radius)
let
Now, consider the triangle TSR i.e.,
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