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sweetsh:
No I think sequences is an easy thing in Mathematics...

emi:
an observer at the top of a tower of height 20m sees a man due east if him at an angle of depression of 27 degree . He sees another man due south oh him at an angel of depression of 30 degree. find the distance between the two men on the ground .


this is an Question in the trigonometry can you tell me how to solve it ?? at MS the answer is 52.4 .

thanks

sweetsh:
Which year is that?

emi:
i have in our book  at the end of each chapters questions from past papers . they didnt mention any year . so i dont know

astarmathsandphysics:

--- Quote from: emii on April 12, 2009, 03:27:17 pm ---an observer at the top of a tower of height 20m sees a man due east if him at an angle of depression of 27 degree . He sees another man due south oh him at an angel of depression of 30 degree. find the distance between the two men on the ground .


this is an Question in the trigonometry can you tell me how to solve it ?? at MS the answer is 52.4 .

thanks

--- End quote ---
Horizontal distance from tower to 1st man: tan27=o/a=20/a so a=20/tan27=39.25
Horixontal distance from tower to 2nd man=20/tan30=34.64
There is a right angle between these 2 lengths so use Pythagoras theorem
d=sqrt(39.25^2+34.64^2)=52.4m

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