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C3 Trig multiple solutions help!!

Hi, I don't understand how the worked solution has gotten multiple solutions for
part b of q8?

Any help would be greatly appreciated

Paper
http://www.madasmaths.com/archive/iygb_practice_papers/c3_practice_papers/c3_q.pdf

Model answers
http://www.madasmaths.com/archive/iygb_practice_papers/c3_practice_papers/c3_p_solutions.pdf
Original post by ctij
Hi, I don't understand how the worked solution has gotten multiple solutions for
part b of q8?

Any help would be greatly appreciated

Paper
http://www.madasmaths.com/archive/iygb_practice_papers/c3_practice_papers/c3_q.pdf

Model answers
http://www.madasmaths.com/archive/iygb_practice_papers/c3_practice_papers/c3_p_solutions.pdf


Your question paper (paper Q) doesn't match the markscheme (paper P).

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