railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Trigonometry Trigonometric Ratios and Identities

यदि cos⁴ θ - sin⁴θ = 4/5 है, तो sin 4θ का मान ज्ञात कीजिए।

1

16/25

2

24/25

3

18/25

4

21/25

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