Trigonometry.

Asked by khushal305 | 18th Feb, 2010, 03:52: PM

Expert Answer:

Dear Student

Tan 45 =1 = AB/BC  ==>  BC=h

DE=DC X sin 30=  0.5 mile

EC=DC cos 30=3/2

Tan 60= (h-DE)/BE = (h-DE)/(BC-EC)=(h-0.5)/(h-3/2)= 3

(h-0.5)= (h-3/2)3

==>   h(1-3)=(0.5-3/2)

==> h=(0.5-3/2) /(1-3)=1.366 mile

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Answered by  | 18th Feb, 2010, 04:52: PM

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