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RRB Junior Engineer / DMS / CMA 2019 · Question 772 of 3719

If A=$$30^\circ$$ then find the value of $$cos^{2}A+cos^{2}(60+A)+cos^{2}(60-A)$$

  1. A$$\frac{3}{2}$$Correct
  2. B$$\frac{\sqrt{3}}{2}$$
  3. C$$\frac{-3}{2}$$
  4. D1

Answer: A. $$\frac{3}{2}$$

Official answer key verified. Detailed explanation coming soon.

Source: RRB JE 2019 CBT-1 (23-May-2019 Shift 2) — cracku.in solved paper with answer key · reliable-secondary

← Q771View full paper (3719 questions)Q773 →

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