Question

a man standing on the Deck of a ship,5 metre above the sea level sees the top of a Lighthouse at an angle of elevation 70 degree and its foot at an angle of depression 30 degree. How far is the Lighthouse from the ship?also calculate the height of the Lighthouse.
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Answer 1

Answer is

X= 18

Step by step explanation

Acc to question it is saying that one angle is of 45° other than 90° ok and its perpendicular is of 18 m

Now taking the 45°

Tan 45°=P/Q

AS YOU KNOW TAN 45°=1

AND IN THIS LET THE BASE OF THE TRIANGLE WHICH IS THE PERPENDICULAR FOR THAT ANGLE LET IT BE X

AND THE BASE BE 18 WHICH IS GIVEN

JUST PUT THE VALUES NOW

TAN 45= X/18

1=x/18