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### See 1 Answer

No.

2 sin2 x - 2 sin x - 2 = 0

sin2 x - sin x - 1 = 0

It's 1, not 2.

2 sin2 x - 2 sin x - 2 = 0

sin2 x - sin x - 1 = 0

It's 1, not 2.

Not to worry, your workings are correct thereafter. I do make errors from time to time.