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# Need help! watch

1. Attachment 693874693876Can anyone help?
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2. Well if you thought about it as a right angle triangle with the hypotenuse length = 800 and θ = 30° would you be able to sort it out?
3. (Original post by Joinedup)
Well if you thought about it as a right angle triangle with the hypotenuse length = 800 and θ = 30° would you be able to sort it out?
No, how would you do that?
4. (Original post by Joinedup)
Well if you thought about it as a right angle triangle with the hypotenuse length = 800 and θ = 30° would you be able to sort it out?
Wait, is it trigonometry?
5. (Original post by student308308)
Wait, is it trigonometry? So you'd do sin30 x 800?
yeah, that's the right idea - but check which trig function you need to get the side that's parallel to the plane's velocity.
6. (Original post by student308308)
Wait, is it trigonometry?
That is one of the components - what is the one in the direction the plane is travelling?
7. (Original post by Joinedup)
yeah, that's the right idea - but check which trig function you need to get the side that's parallel to the plane's velocity.
cos30 x 800?
8. (Original post by student308308)
cos30 x 800?

usually written as 800 cos 30 though, to make it very clear that you're taking the cosine of 30 and then multiplying by 800 and not multiplying 30 by 800 and then taking the cosine of that.
9. (Original post by Joinedup)

usually written as 800 cos 30 though, to make it very clear that you're taking the cosine of 30 and then multiplying by 800 and not multiplying 30 by 800 and then taking the cosine of that.
Thanks so much
10. (Original post by Muttley79)
That is one of the components - what is the one in the direction the plane is travelling?
Thanks for the help

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