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C2 Review exercise 3 Q17 (a)

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1. The curve S, for 0≤𝑥<360°, has equation 𝑦 = 2sin[(2/3)𝑥 - 30°].
(a)Find the coordinates of the point where S meets the 𝑦-axis.

Ans:
𝑥 = 0
𝑦 = 2sin[(2/3)*(0) - 30°]
= 2sin[ - 30°]
= 2*(-½)
= -1

But the answer given in the book is (0,-2).
Can anyone please tell me what I did wrong?
2. (Original post by hajerabazaz)
The curve S, for 0≤𝑥<360°, has equation 𝑦 = 2sin[(2/3)𝑥 - 30°].
(a)Find the coordinates of the point where S meets the 𝑦-axis.

Ans:
𝑥 = 0
𝑦 = 2sin[(2/3)*(0) - 30°]
= 2sin[ - 30°]
= 2*(-½)
= -1

But the answer given in the book is (0,-2).
Can anyone please tell me what I did wrong?
Book's wrong.

(0,-1) is correct.

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