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As observed from the top of a 75 metre Lighthouse from the sea level the angle of depression of two ships are 30 and 45 ones exactly behind the other on the same side of Lighthouse find the difference between them

Posted by Sujal Sahu 5 years, 8 months ago

CBSE > Class 10 > Mathematics

1 answers

Sahana Lotus 5 years, 8 months ago

First draw a perpendicular line, and from the top, draw line of slight to the bottom.Mark the angle near tower as 45 and the next as 30. Find the length of the base of the first triangle with angle 45, using tan 45. Take the full length from the foot of the tower till the last ship[ where 30 ends] as X. Now take the length from the first ship to the second ship as X - 75 [ u will get the first ans as 75] . Then solve using tan 30. You will get the answer. Hope it was useful. All the best for your exams...do well.....

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