If 1+sin²Ф= 7/4, find the value of Ф
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sin² Ф = 7/4 - 1 = 3/4
sinФ = +√3/2 or -√3/2
Ф = +60°, +120° or 240° or 300°
sinФ = +√3/2 or -√3/2
Ф = +60°, +120° or 240° or 300°
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