Solve for x : cos2 30° + sin2 2x = 1

Solve for x : cos² 30° + sin² 2x = 1

बेरीज

cos²30° + sin²2x = 1
sin²2x = 1 – cos²30°

sin²2x = `(1)/(2)`

2x = 30°
x =15°

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