Mathematics NDA/NA SOLVED PAPER 2021-II (51 to 100)

Total Questions: 50

31. equal to?

Correct Answer: (b) 2 only
Solution:

32. equal to?

Correct Answer: (d) π/2
Solution:

33. equal to?

Correct Answer: (a)
Solution:

34. equal to?

Correct Answer: (c) Both 1 and 2
Solution:

35. Find the vector?

Correct Answer: (c) 2√3
Solution:

36. If y = (1 + x) (1 + x²) (1 + x⁴) (1 + x⁸) (1 + x¹⁶) then what is dy/dx at x = 0 equal to?

Correct Answer: (b) 1
Solution:

37. If y = cos x . cos 4x . cos 8x, then what is 1/y dy/dx at x = π/4 equal to?

Correct Answer: (a) -1
Solution:

38. Let f (x) be a polynomial function such that fo f(x) = x⁴. What is f' (1) equal to?

Correct Answer: (c) 2
Solution:

39. equal to?

Correct Answer: (c) 1
Solution:

40. Find the value?

Correct Answer: (d) 1
Solution: