Recent questions tagged jeemain-2019-maths

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The Boolean expression ∼(p⇒(∼q)) is equivalent to :

asked Jun 4, 2021 in Uncategorized by Doubtly (98.9k points)

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1 answer 251 views

A plane which bisects the angle between the two given planes 2x – y + 2z – 4 = 0 and x + 2y + 2z – 2 = 0, passes through the point :0

asked Jun 3, 2021 in Uncategorized by Doubtly (98.9k points)

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The equation of the common tangent to the curves y^2 = 8x and xy = - 1 is

asked Jun 3, 2021 in Uncategorized by Doubtly (98.9k points)

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The general solution of the differential equation (y^2 – x^3 )dx – xydy = 0 (x ≠ 0) is :

asked Jun 3, 2021 in Uncategorized by Doubtly (98.9k points)

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1 answer 222 views

Let a ∈ (0,π/2) be fixed. If the integral ∫ tan x + tan α/tan x - tan α dx = A(x) cos 2α + B(x) sin 2α + C, where C is a

asked Jun 3, 2021 in Uncategorized by Doubtly (98.9k points)

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2 answers 363 views

A bird is sitting on the top of a vertical pole 20 m high and its elevation from a point O on the ground is 45°

asked Mar 19, 2021 in Uncategorized by Gyani

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1 answer 219 views

If x = √3/2 + i/2(i = √-1), then (1 + iz + z5 + iz8)9 is equal to -

asked Mar 15, 2021 in Uncategorized by Gyani

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1 answer 220 views

If (z - α)/(z + α) (α ∈ R) is a purely imaginary number and |z| = 2, then a value of α is :

asked Mar 15, 2021 in Uncategorized by Bharat

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1 answer 240 views

Let A={θϵ(-π/2π):3+2isinθ/1-2isinθ is purely imaginary} then the sum of elements in A is

asked Mar 14, 2021 in Uncategorized by Sarthak

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1 answer 422 views

The value of cos π/2^2.cosπ/2^3..... .cosπ/2^10.sinπ/2^10

asked Mar 14, 2021 in Uncategorized by Doubtly (98.9k points)

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1 answer 891 views

tanA/(1-cotA) + cotA/(1-tanA) can be written as

asked Mar 11, 2021 in Uncategorized by anonymous

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1 answer 388 views

cos210° - cos10°cos50° + cos250° is equal to (1) 3/2 (2) 3/4 (3) 3/2(cos20° + 1) (4) 3/4(cos20° + 1)

asked Mar 11, 2021 in Uncategorized by anonymous

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1 answer 125 views

Two vertical poles of heights, 20 m and 80 m stand a part on a horizontal plane

asked Mar 10, 2021 in Uncategorized by anonymous

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1 answer 212 views

If cos (α + β) = 4/5 and sin (α – β) = 5/13 , where they lie between 0 and π/4, find the value of tan2α

asked Mar 10, 2021 in Uncategorized by anonymous

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1 answer 353 views

If alpha=cos^-1(3/5) , beta=tan^-1(1/3), where 0<alpha,beta<π/4 , then alpha-beta is equal to

asked Mar 10, 2021 in Uncategorized by anonymous

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1 answer 431 views

The maximum value of 3cos theta+5sin{theta-π/6) for any real value of theta is

asked Mar 10, 2021 in Uncategorized by anonymous

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