Find A, if 0° ≤ A ≤ 90° and sin 3A - 1 = 0 - Vidyadip

Question

Find A, if 0° ≤ A ≤ 90° and sin 3A - 1 = 0

✓

Answer

sin 3A - 1 = 0
⇒ sin3A = 1
We know sin 90° = 1
∴ 3A = 90°
Hence, A = 30°

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