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5 June, 21:01

Use the unit circle to find all values of thetabetween 0 and 2Ï€ for which sin (theta) = sqrt 3/2

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  1. 5 June, 21:20
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    Sin (theta) = √3/2, 0≤theta≤360

    In a unit circle, sin is y/r, r is always positive, y is positive in the first and second quadrant only.

    sin60=√3/2, sin120=√3/2

    so theta is 60 or 120
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