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How many solutions does the equation (2 sin x + 1)(sin x – 1) = 0 have over the interval 0 ≤ x < 2π?
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How many solutions does the equation (2 sin x + 1)(sin x – 1) = 0 have over the interval 0 ≤ x < 2π?

User Pgrono
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1 Answer

3 votes

The initial equation is


(2\sin x+1)(\sin x-1)=0

We can expand this expression as shown below

User Yehosef
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