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VCE Stuff => VCE Mathematics => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Mathematical Methods CAS => Topic started by: VVVCCCEEE on July 29, 2018, 02:45:40 pm

Title: Help?
Post by: VVVCCCEEE on July 29, 2018, 02:45:40 pm

Would someone please explain to me how you got d or e and so on. I don't get how you find t.

Also, could someone explain to me how to determine the angles in q3?
Thanks

Title: Re: Help?
Post by: Yertle the Turtle on July 29, 2018, 02:54:44 pm

Quote from: VVVCCCEEE on July 29, 2018, 02:45:40 pm

Would someone please explain to me how you got d or e and so on. I don't get how you find t.

Also, could someone explain to me how to determine the angles in q3?
Thanks

At present there is nothing attached, that would help us answer you. :P

Title: Re: Help?
Post by: VVVCCCEEE on July 29, 2018, 03:01:10 pm

Ah sorry, it's attached now

Title: Re: Help?
Post by: Bri MT on July 29, 2018, 05:04:52 pm

- Draw the unit circle out
(0 (and/or equivalently) 2pi on the right, pi/2 on the top, pi on the right,  3pi/2 on the bottom)
-  for a) 27pi = 26pi + 1pi
- 26pi means going around the unit circle 13 times, you end up back at the 0/2pi/4pi/6pi etc position
- by adding the leftover pi, we get to the left of the unit circle
- sin(pi)= 0 and cos(pi)=-1
For e) 11pi/2 = 8pi/2 + 3pi/2 = 2 full rotations around the circle + 3pi/2

Hope this helps :)