1
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Read the given information carefully and answer the given questions.
If $$p = X\cos \theta - Y\sin \theta $$,
$$q = X\sin \theta + Y\cos \theta $$ and
$${p^2} + 4pq + {q^2} = A{X^2} + B{Y^2}$$, $$0 \le \theta \le {\pi \over 2}$$.
If $$p = X\cos \theta - Y\sin \theta $$,
$$q = X\sin \theta + Y\cos \theta $$ and
$${p^2} + 4pq + {q^2} = A{X^2} + B{Y^2}$$, $$0 \le \theta \le {\pi \over 2}$$.
What is the value of B?
2
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Read the given information carefully and answer the given questions.
It is given that $$\cos (\theta - \alpha ) = a$$, $$\cos (\theta - \beta ) = b$$.
It is given that $$\cos (\theta - \alpha ) = a$$, $$\cos (\theta - \beta ) = b$$.
What is $$\cos (\alpha - \beta )$$ equal to?
3
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
Read the given information carefully and answer the given questions.
It is given that $$\cos (\theta - \alpha ) = a$$, $$\cos (\theta - \beta ) = b$$.
It is given that $$\cos (\theta - \alpha ) = a$$, $$\cos (\theta - \beta ) = b$$.
What is $${\sin ^2}(\alpha - \beta ) + 2ab\cos (\alpha - \beta )$$ equal to?
4
NDA 2019 Paper 1
MCQ (Single Correct Answer)
+2.5
-0.83
If $$\sin \alpha + \cos \alpha = p$$, then what is $${\cos ^2}(2\alpha )$$ equal to?
Questions Asked from Trigonometric Angles and Equations (Marks 2.5)
Number in Brackets after Paper Indicates No. of Questions
NDA Subjects
Mathematics
Algebra
Sets, Relations and Functions Logarithms Quadratic Equations and Inequalities Sequence And Series Binomial Theorem Matrices Determinants Permutations and Combinations Probability Complex Numbers Vector Algebra Three Dimensional Geometry Statistics
Trigonometry
Trigonometric Angles and Equations Inverse Trigonometric Function Height and Distance Properties of Triangles
Coordinate Geometry
Calculus
English
General Studies