Find A, if 0° ≤ A ≤ 90° and 4 sin2 A – 3 = 0 - Mathematics

Find A, if 0° ≤ A ≤ 90° and 4 sin² A – 3 = 0

Sum

4 sin² A – 3 = 0

`=> sin^2A = 3/4`

`=> sin A = sqrt(3)/2`

We know `sin 60^circ = sqrt(3)/2`

Hence, A = 60°

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