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Mathematics Preparation for NDA

(58 Posts)

This thread is dedicated to preparation for Mathematics section of NDA. You may share questions related to topics like Integral Calculus, Complex Numbers, Matrices and Determinants, Vectors, 3-D Geometry, Sequence/Series, Trigonometry, Co-Ordinate Geometry, Exponential and Logarithmic Series, Modern Algebra, Statistics, Differential Calculus, Functions and Equations, Permutation and Combination, Probability etc.

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Aman Yadav
Shared from Matrices & Determinants on Aug 26, 2020 1:12 AM

A and B are any two square matrices which one of the following is a skew symmetric matrix?

 
none of above
Please type your answer before submitting.

Sir answer is A-A'/2

Supriya Singh
Shared from NDA - I (2015) Maths on Aug 17, 2020 12:28 PM

Given that the vectors and are non-collinear. The values of x and y, respectively, for which = holds true if = 2x + y and = 2– 5, are

 
x = 2, y = 1
x = 1, y = 2
x = – 2, y = 1
x = – 2, y = – 1
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How can you solve this question without giving value of vector v????

Supriya Singh
Shared from NDA - (II) 2014 Maths on Aug 14, 2020 10:28 AM

Consider the plane passing through the points A (2, 2, 1), B (3, 4, 2) and C (7, 0, 6).

Which of the following points lies on the plane?

 
(1, 0, 9)
(1, 0, 1)
(0, 0, 1)
None of the above
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As when we will put value of x and z the answer will be 0 not 1

Aniket Kumar
Shared from Mathematics - 5 on Aug 06, 2020 3:32 PM

is equal to

 
1
0
2
None of these
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Cant we use L'Hospital Rule here?

Aniket Kumar
Shared from Mathematics - 2 on Jul 28, 2020 9:30 PM

If sin 2θ = cos 3θ, then θ is equal to

 
30°
60°
90°
None of these
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Theta can also be 18