Fitzpatrick question (1 Viewer)

[big_bang344]

Can anyone help me with question 1 from exercise 21.1 in the 3 unit fitzpatrick book? Help would be greatly appreciated

 

[Alkanes]

Post up the question.

 

[big_bang344]

Actually. I need help with question 3. The question is' From a point P, a man observes that the angle of elevation of the top of the cliff, A is 40 degrees. After walking 100 m towards A along a straight road, inclined at an angle of 15 degrees to the horizontal, the angle of elevation of A is observed to be 50 degrees. Find the vertical height of A above P'.

 

[SpiralFlex]

http://community.boredofstudies.org/showthread.php?t=271163&page=2

=.=

Did wrong question, 21.1 is not an exercise?

 

[tohriffic]

Actually. I need help with question 3. The question is' From a point P, a man observes that the angle of elevation of the top of the cliff, A is 40 degrees. After walking 100 m towards A along a straight road, inclined at an angle of 15 degrees to the horizontal, the angle of elevation of A is observed to be 50 degrees. Find the vertical height of A above P'.

Hi do you have the answer? I think I have it but I'm not sure... > ^ <

 

[Alkanes]

Spi is working on it so i won't bother...

 

[Fizzy_Cyst]

I got 270ish :\

Bit of randomness using trig only, so I doubt it is correct, haha.

OMGzzz found mistake

 

[big_bang344]

The answer is 212.3 meters. did you get it right?

 

[SpiralFlex]

The answer is 212.3 meters. did you get it right?

That is what I got.

 

[SpiralFlex]

Remember to always draw a pretty diagram.

 

[SpiralFlex]

In






In






Now,

In



Metres.

 

[Fizzy_Cyst]

Yep, 212.3m

Damn j00 spi, j00 beateth me.

 

[SpiralFlex]

I would like to re-iterate Spiral tip #233. ALWAYS draw a pretty diagram.

 

[big_bang344]

Wow. You truly are amazing Spiral. Haha. I finally got the answer from your drawing. How is it that you interpret the question so well? I can easily get the answer if I had the diagram but when I try to draw it out, it is ALWAYS the wrong diagram. Thanks again Spiral!

 

[SpiralFlex]

Wow. You truly are amazing Spiral. Haha. I finally got the answer from your drawing. How is it that you interpret the question so well? I can easily get the answer if I had the diagram but when I try to draw it out, it is ALWAYS the wrong diagram. Thanks again Spiral!

17 years, 17 years + pretty diagrams.

 

[big_bang344]

Hey Spiral! Can you help me out with question 7? The same exercise. Thanks!

 

[SpiralFlex]

Hey Spiral! Can you help me out with question 7? The same exercise. Thanks!

Okay, my English on Monday is no biggy, only 20%.

Let me see...

 

[Drongoski]

For Q3 (need Spi's help to draw the diagram)

Let h - height of point A and x = horizontal distance of A from P. Then:

 

[SpiralFlex]

Make subject of two equations. Then solve.






Change to the subjects and solve. Might as well do it for you.