The observer sees a straight fence 100 m long in 30° view angle. From one end of the fence is 102 m.

How far is it from another end of the fence?

Correct answer:

x =  119.9 m

Step-by-step explanation:

sin30sinβ=60102 β=arcsin(60102sin30)=1.016=58°1242" γ=1803058°1242"=91°4718"  sinβsinγ=102x x=102sinβsinγ=119.9 m

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