त्रिकोणमिति Part-3

Total Questions: 50

11. मान ज्ञात कीजिये ? [RRB NTPC 29/12/2020 (Evening)]

Correct Answer: (d) −1
Solution:

12. cos12° + cos84° + cos168° + cos96° का मान क्या है ? [RRB NTPC 30/12/2020 (Morning)]

Correct Answer: (b) 0
Solution:

13. यदि tanθ + cotθ = 5 है, तो tan²θ + cot²θ + 2tan²60° का मान ज्ञात कीजिये ? [RRB NTPC 04/01/2021 (Morning)]

Correct Answer: (a) 29 
Solution:

14. tan15° + cot15° का मान ज्ञात कीजिये ? [RRB NTPC 04/01/2021 (Evening)]

Correct Answer: (a) 4 
Solution:

15. sin(45° + A) – cos(45° – A) का मान क्या होगा ? [RRB NTPC 05/01/2021 (Morning)]

Correct Answer: (c) 0
Solution:

16. यदि sin2A = 2sinA तो A = ? [RRB NTPC 05/01/2021 (Evening)]

Correct Answer: (c) 0°
Solution:

17. (sinA + cosA)² – 2sinAcosA किसके समतुल्य है ? [RRB NTPC 05/01/2021 (Evening)]

Correct Answer: (c) 1
Solution:

18. निम्न का मान ज्ञात कीजिये ? [RRB NTPC 08/01/2021 (Morning)]

Correct Answer: (a) cos²Φ 
Solution:

19. यदि 6(sec²59° – cot²31°) + 2/3 sin90° – 3tan²56° ytan²34° = 𝑦/3 है, तो y का मान ज्ञात कीजिये ? [RRB NTPC 08/01/2021 (Evening)]

Correct Answer: (b) 2
Solution:

20. यदि √3 sinθ – cosθ = 0 (θ न्यू्न कोण है) तो cos³θ – √3 sin³θ का मान ज्ञात कीजिये ? [RRB NTPC 09/01/2021 (Morning)]

Correct Answer: (a)
Solution: