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VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE General & Further Mathematics => Topic started by: #1procrastinator on October 21, 2011, 11:29:51 am

Title: Trigonometry question (from Essentials book)
Post by: #1procrastinator on October 21, 2011, 11:29:51 am

From Exercise 14B, question 12 (there's a diagram)

A light aircraft flying at a height of 500m above the ground is sighted by an observer stationed at a point O on the ground, measured to be 1km from the plane. The aircraft is travelling

I got 127.94 degrees for b) but not sure if it's correct or not cause the book's solution appears to be incorrect (something around 215 degrees). And 4.97 degrees for c) rather than 6.56 degrees

Is this right?

Title: Re: Trigonometry question (from Essentials book)
Post by: #1procrastinator on October 26, 2011, 01:08:39 am

3rd edition of the textbook by the way, I found it for those who don't have the textbook or have a different edition

pg 352 question 11 here: http://www.cambridge.edu.au/education/resource/pageproofs_13_652354.pdf

Title: Re: Trigonometry question (from Essentials book)
Post by: adRo93 on October 26, 2011, 07:09:44 pm

For part b. i got ~215.64
and part c. ~6.59.
Which leads me to believe the book is correct. Its a pretty hard question for further.
If you share your workings I can point out where you went wrong.

Title: Re: Trigonometry question (from Essentials book)
Post by: #1procrastinator on October 28, 2011, 04:03:58 pm

I got it now, I didn't take into account 'BEARING' and also error with the distance, I added the distance travelled in 1 minute to some other number for some reason haha