Q21.1 2 d 1 (cos x) dx 1 x Where –
Correct answer: 1 x 1
Q22.The normal to a given curve is parallel to x– axis if–
Correct answer: dx 0 dy
Q23.Pole of a function is a point where the function becomes:
Correct answer: Unbounded
Q24.The minimum value of 4 cosθ + 3 is
Correct answer: –1
Q25.The angle of intersection of the curves y = 4 – x2 and y = x2 is
Correct answer: –1 4 2 tan 7
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Q26.The shortest distance between the parabola y=x2 and the straight line x–y=5 is-
Correct answer: 19 2/8
Q27.The radius of curvature of the curve s = a log tan π ψ + 4 2 is –
Correct answer: a secψ
Q28.If the normal to curve y = f(x) at the point (a, b) makes an angle 3 4 π with the positive x axis then f'
Correct answer: 1
Q29.The line y = mx + 1 is a tangent to the parabola y2 = 4x, if
Correct answer: m = 1
Q30.Asymptotes of the curve x2 y2 = a2 (x2 + y2) are–
Correct answer: x = ± a, y = ± a
Q31.If y = 4x – 5 is equation of the tangent to a curve y2 = ax3 + b at (2, 3), then (a, b) is equal to
Correct answer: (2, –7)
Q32.Sum of maximum and minimum values of 4(sin2 θ + cos4 θ) is
Correct answer: 7
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Q33.The function sinp θ cosq θ attains its maximum value, when-
Correct answer: 1 tan p / q − θ =
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Q34.When we expand sin 4 π θ + in powers of θ, the coefficient of 3 3! θ is-
Correct answer: −1/2
Q35.If x is a real number, then the function f(x) = x3 + x2 + x + 1 has
Correct answer: neither maximum nor minimum value
Q36.The tangent to the curve 2 3 2 2 2at 2at x =,y = 1+ t 1+ t at the point for which 1 t = 2, is
Correct answer: 13x – 16y = 2a
Q37.For all real x, the minimum value of 2 1 – x + x 1+ x + x is
Correct answer: 1/3
Q38.The point on the curve y2 = x, the tangent at which makes an angle π 4 with x- axis, is
Correct answer: 1 1, 4 2
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Q39.If the function f(x) = a sinx + 1 3 sin3x has maximum value at x = π 3, the value of a is
Correct answer: 2
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Q40.The equation of the tangent to the curve x = a(θ + sinθ), y = a(1 + cosθ) at the point θ = π 2, is
Correct answer: 2(x + y) = a(π + 4)