HSC Stuff > HSC Mathematics Extension 1

Projectile Motion

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christopher.farag:
Hey,

I was teaching myself projectile and have gotten a bit confused. When is it that the angle found needs to be left negative, or the positive value needs to be taken?

Eg in question 4d attached, the angle of -8 degrees must be absolute valued, to be +8.

However in question 2cii attached, the negative value is kept as negative.

Slightly confused.

Thanks heaps in advance!

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