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RRB Junior Engineer / DMS / CMA 2019 · Question 2172 of 3719

If $$\sin 2A = 2 \sin^2 A$$, then find the value of '$$A$$' ($$A$$ ≠ 0 and $$A$$ is acute).

  1. A$$30^\circ$$
  2. B$$45^\circ$$Correct
  3. C$$60^\circ$$
  4. D$$90^\circ$$

Answer: B. $$45^\circ$$

Official answer key verified. Detailed explanation coming soon.

Source: RRB JE 2019 CBT-1 (28-May-2019 Shift 2) — cracku.in solved paper with answer key · reliable-secondary

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