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Directional derivatives

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Directional derivatives
3-dimensional coordinate geometry
3D Geometry
A Line Segment
A Mind-Reading Game
Absolute maxima and Absolute minima
Addition and Subtraction of Algebraic Expressions
Addition of Integers
Addition of Numbers with Decimals
Addition of Vectors
Adjoint and Inverse of a Matrix
Adjoint of a Matrix
Age
Algebra
Algebra
Algebra
Algebra of Complex Numbers
Algebraic Expressions
Algebraic Identities
Algebraic Methods of Solving a Pair of Linear Equations
Algebraic Solutions of Linear Inequalities in One Variable and their Graphical Representation
Alloy
Altitudes Of A Triangle
Analytic Functions
Analytic functions
Analytical Geometry
Angle Between Curves
Angle Subtended by a Chord at a Point
Angle Subtended by an Arc of a Circle
Angle Sum Property Of A Triangle
Angle between Two Planes
Angle between a Line and a Plane
Angle between two lines
Angles
Angles – ‘Acute’, ‘Obtuse’ and ‘Reflex’
Angles – ‘Right’ and ‘Straight’
Application of Determinants
Application of Integrals
Application of calculus
Application of derivatives
Applications of Compound Interest Formula
Applications of Conics
Applications of Derivatives
Applications of Determinants and Matrices
Applications of Vectors
Approximations
Area
Area Of A Parallelogram
Area between Two Curves
Area of Rhombus
Area of a Polygon
Area of a Triangle
Area of a Triangle - by Heron’s Formula
Area of the region bounded
Area under Simple Curves
Areas Related to Circle
Areas Related to Circles
Areas of Sector and Segment of a Circle
Arithmetic Mean
Arithmetic Operations
Arithmetic Progression
Arithmetic Progression
Arithmetic Progression and Quadratic Equations
Arithmetic Progression and Variance
Arithmetic and Geometric Progressions
Average
Average Speed
Averages
Axiomatic Approach to Probability
Banking (Recurring Deposit Accounts)
Basic Algebra
Basic Geometrical Ideas
Basics of Accounting
Basics of Probability
Baye's Theorem
Bayes' Theorem
Bernoulli Trials and Binomial Distribution
Binary Operations
Binary operations
Binomial Distribution
Binomial Expansion
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Binomial Theorem for Positive Integral Indices
Binomial distribution
Binomial theorem
Bivariate Normal Distribution
Boat and Stream
Boolean Algebra
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Calculation of Area and Volume
Calculus
Calculus
Cartesian Product of Sets
Cartesian System
Cauchy's Integral Theorem
Cauchy’s integral formula
Central Limit Theorem
Chain Rule
Chance and Probability
Charge Given On Borrowed Money Or Simple Interest
Checking For Parallel Lines
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Circle and Parabola Geometry
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Circular Motion
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Classification of Triangles
Co-ordinate Geometry
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Common Factors and Common Multiples
Comparing Decimals
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Composition of Functions and Invertible Function
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Core Mathematics
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Decimal Number System
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Definite Integral
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Differentiation of Implicit Functions
Differentiation of Parametric Functions
Direct Proportion
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Distance between Two Lines
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Division Of Decimal Numbers
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Elementary Mathematics
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Equal Chords and their Distances from the Centre
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Equation of Circle
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Equations
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Error analysis
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Euclid’s Definitions, Axioms and Postulates
Euler’s Theorem
Evaluation of Definite Integrals by Substitution
Evaluation of Limits
Evaluation of derivatives
Event
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Exponential and Logarithmic Functions
Exponents
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Exterior Angle Of A Triangle And Its Property
Faces, Edges And Vertices
Factorisation
Factorisation of Polynomials
Factors and Multiples
Family of Lines
Financial Mathematics
Finding the Square of a Number
Finite and Infinite Sets
Formation of a Differential Equation
Fourier series
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Functions
Fundamental Theorem of Calculus
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General Equation of a Line
General and Particular Solutions of a Differential Equation
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Geometrical Meaning of the Zeroes of a Polynomial
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Graphical Method of Analysis
Graphical Method of Solution of a Pair of Linear Equations
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Group Theory
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Highest Common Factor
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Introduction to Graphs
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Inverse Proportion
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Ordinary Differential Equations
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Pair of Linear Equations in Two Variables
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Percentage – Another Way Of Comparing Quantities
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Prime and Composite Numbers
Principle of Mathematical Induction
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Properties Of Addition And Subtraction Of Integers
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Properties of Lines
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Properties of Triangles
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Properties of a Parallelogram
Proportion
Propositional Logic
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Quadratic Equation
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Relationship between Zeroes and Coefficients of a Polynomial
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Ring Theory
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Series
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Solution of Differential Equations
Solution of a Linear Equation
Solution of a Quadratic Equation by Factorisation
Solutions of Differential Equations
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Solving Equations having the Variable on both Sides
Some Applications
Some Applications of Trigonometry
Some More Criteria for Congruence of Triangles
Some More Interesting Patterns
Some Problems on HCF and LCM
Some Properties of Definite Integrals
Some Properties of a Triangle
Some Special Parallelograms
Spanning Trees
Special Functions
Special Terms of Binomial Expansion
Speed and velocity
Speed, Time and Distance
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Square and Square Roots
Standard deviation
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Subtraction of Integers with the help of a Number Line
Sum Of The Lengths Of Two Sides Of A Triangle
Sum of First n Terms of an AP
Sum of the Measures of the Exterior Angles of a Polygon
Surds and Indices
Surface Area of Cube, Cuboid and Cylinder
Surface Area of Revolution
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System of Linear Equations
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Tangent to a Circle
Tangents and Normals
Tax
Taylor series
Tests for Divisibility of Numbers
The Empty Set
The Fundamental Theorem of Arithmetic
The Idea of a Variable
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The Modulus and the Conjugate of a Complex Number
Theory of Equations
Three Dimensional Geometry
Three Dimensional Geometry
Time Series Analysis
Time Speed Distance
Time and Work
Time, Speed and Distance
Topology
Transpose of a Matrix
Transpose of a Matrix
Triangles
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Trigonometric Identities
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Trigonometry
Trigonometry
Types of Functions
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Understanding Quadrilaterals
Uniform Convergence
Union and Intersection of Sets
Unit Digit
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Unitary Method
Universal Set
Use Of Bar Graphs With A Different Purpose
Use Of Percentages
Use of Exponents to Express Small Numbers in Standard Form
Using Decimals
Variance
Variance and Standard Deviation
Various Forms of the Equation of a Line
Vector Algebra
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Venn Diagrams
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What is Factorisation?
Whole Numbers
angle between two lines
applications of integrals
argand plane
axiomatic approach to probability
binomial distribution
binomial expansion formula
cartesian products of sets
chords
circle
complement of a set
composite of functions
conjugate of a complex number
coordinates of a point in space
distance
distance and displacement
distance between two points
frequency distributions
fundamental principle of counting
general and middle terms
general equation of a line
geometric progression
graphical solution of linear inequalities in two variables
homogeneous differential equation
implications
inequalities
integral
introduction to three dimensional geometry
limits and derivatives
limits of trigonometric functions
linear inequalities
linear inequalities in one variable
lpp graphical method
mathematical reasoning
matrix transformation
measurement of angles
new statements from old
nth Term of an AP
permutations and combinations
probability meaning
range
relationship between a.m. and g.m.
sections of a cone
sequences
sets
solution of system of linear inequalities in two variables
special words/phrases
types of differential equations
types of functions
types of matrices
types of relations
types of sets
types of vectors
validating statements
x-intercepts and y-intercepts

List of top Mathematics Questions on Directional derivatives

A unit vector which is perpendicular to the surface of the paraboloid of revolution $z = x^2 + y^2$ at the point (1,2,5) is

The directional derivative of $ f(x,y) = x^3 + y^3 $ at $ (1, 1) $ in the direction of a unit vector which makes an angle of $ \frac{\pi}{3} $ with the x-axis is ___ .

The maximum area of a rectangle that can be inscribed in a circle of radius 2 units is