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Hi there! My name is "Quoc Dat", and "Phung" is my last name. I love creating content and making tutorials about math and coding on Youtube!

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Featured video

Disk/Washer vs. Cylindrical Shell...when to use which?

Quoc Dat Phung

234,315 views

4 years ago

Disk/Washer vs. Cylindrical Shell...when to use which?

Disk/Washer vs. Cylindrical Shell...when to use which?

234,315 views

4 years ago

Round Numbers to the Nearest Ten, Hundred, Thousand, and More!

Round Numbers to the Nearest Ten, Hundred, Thousand, and More!

219,531 views

2 years ago

Improper Integrals - Convergent or Divergent (Made Easy)

Improper Integrals - Convergent or Divergent (Made Easy)

122,239 views

3 years ago

Quicksort Algorithm: A Step-by-Step Visualization

Quicksort Algorithm: A Step-by-Step Visualization

109,995 views

2 years ago

How to Prove or Disprove Big-O - Introduction to Computer Science

How to Prove or Disprove Big-O - Introduction to Computer Science

84,067 views

2 years ago

Celsius to Fahrenheit Conversion | The Easy Way

Celsius to Fahrenheit Conversion | The Easy Way

79,597 views

5 years ago

Matrix Chain Multiplication | Dynamic Programming

Matrix Chain Multiplication | Dynamic Programming

70,912 views

3 years ago

Comparison Test for Improper Integrals

Comparison Test for Improper Integrals

69,068 views

3 years ago

Find the Perimeter and Area of Parallelograms!

Find the Perimeter and Area of Parallelograms!

68,616 views

5 years ago

Calculate Work to Pump Liquid Out of Tanks - Calculus 2

Calculate Work to Pump Liquid Out of Tanks - Calculus 2

62,292 views

3 years ago

Cách Giải Rubik 2x2 Cực Kì Dễ (3 Bước)

Cách Giải Rubik 2x2 Cực Kì Dễ (3 Bước)

57,702 views

2 years ago

Find the Volume of Cones using Integral Calculus

Find the Volume of Cones using Integral Calculus

41,989 views

4 years ago

Python for Beginners - Learn Python in 1 Hour (2024)

Python for Beginners - Learn Python in 1 Hour (2024)

3,548 views

1 year ago

Data Structures & Analysis of Algorithms

Quicksort Algorithm: A Step-by-Step Visualization

Quicksort Algorithm: A Step-by-Step Visualization

109,995 views

2 years ago

Merge Sort Algorithm: A Step-by-Step Visualization

Merge Sort Algorithm: A Step-by-Step Visualization

33,183 views

2 years ago

Selection Sort in 2 min (Python)

Selection Sort in 2 min (Python)

3,558 views

3 years ago

Insertion Sort in 2 min (Python)

Insertion Sort in 2 min (Python)

3,741 views

3 years ago

Bubble Sort in 2 min (Python)

Bubble Sort in 2 min (Python)

3,716 views

3 years ago

Counting Sort (Stable): A Step-by-Step Visualization

Counting Sort (Stable): A Step-by-Step Visualization

946 views

4 months ago

Bucket Sort Algorithm: A Step-by-Step Visualization

Bucket Sort Algorithm: A Step-by-Step Visualization

6,683 views

5 months ago

How to Prove or Disprove Big-O - Introduction to Computer Science

How to Prove or Disprove Big-O - Introduction to Computer Science

84,067 views

2 years ago

How to Prove or Disprove Big Ω - Introduction to Computer Science

How to Prove or Disprove Big Ω - Introduction to Computer Science

14,503 views

1 year ago

Differences between Tight Big O, Tight Big Omega, and Tight Big Theta

Differences between Tight Big O, Tight Big Omega, and Tight Big Theta

1,912 views

1 year ago

Secret to A+ in any course (from university student with 9.5/10 CGPA)

Secret to A+ in any course (from university student with 9.5/10 CGPA)

5,842 views

2 years ago

Find Minimum and Maximum Number in Array (Iterative and Recursive)

Find Minimum and Maximum Number in Array (Iterative and Recursive)

11,890 views

3 years ago

Disk/Washer vs. Cylindrical Shell...when to use which?

Disk/Washer vs. Cylindrical Shell...when to use which?

234,315 views

4 years ago

Secret to A+ in any course (from university student with 9.5/10 CGPA)

Secret to A+ in any course (from university student with 9.5/10 CGPA)

5,842 views

2 years ago

U Substitution Integrals - 20 Problems

U Substitution Integrals - 20 Problems

1,868 views

2 years ago

Integration By Parts - Calculus I

Integration By Parts - Calculus I

1,055 views

1 year ago

Proof of Integration by Parts Formula

Proof of Integration by Parts Formula

2,422 views

2 years ago

Memorize Trigonometric Derivatives INSTANTLY Using This Trick!

Memorize Trigonometric Derivatives INSTANTLY Using This Trick!

4,107 views

2 years ago

Trigonometric Substitution (3 Formulas) - Calculus

Trigonometric Substitution (3 Formulas) - Calculus

850 views

1 year ago

Solving the Integral in MY HERO ACADEMIA - Calculus Anime

Solving the Integral in MY HERO ACADEMIA - Calculus Anime

1,986 views

1 year ago

Area Between Curves - Integrating with Respect to Y

Area Between Curves - Integrating with Respect to Y

5,316 views

4 years ago

Area Between Curves by Integration (Easy Way)

Area Between Curves by Integration (Easy Way)

7,983 views

4 years ago

Prove A = πr^2 using Integral Calculus - Area of the Circle Proof

Prove A = πr^2 using Integral Calculus - Area of the Circle Proof

5,283 views

1 year ago

Find the Area of the Ellipse using Integral Calculus

Find the Area of the Ellipse using Integral Calculus

2,067 views

1 year ago

Learn Basic English!

English Numbers 1-100 | Learn English in 3 Minutes

English Numbers 1-100 | Learn English in 3 Minutes

618 views

3 years ago

How to Say BIG NUMBERS in English!

How to Say BIG NUMBERS in English!

30,491 views

3 years ago

Recursion Made Easy!

How to Write Recursion Instead of For/While Loop

How to Write Recursion Instead of For/While Loop

6,138 views

3 years ago

Print 1 To N Recursively (Code Provided)

Print 1 To N Recursively (Code Provided)

3,099 views

3 years ago

Program to Convert an Array to String Using Recursion

Program to Convert an Array to String Using Recursion

624 views

3 years ago

Find the Factorial of a Number In Python(Iterative v.s Recursion)

Find the Factorial of a Number In Python(Iterative v.s Recursion)

1,427 views

3 years ago

Program to Calculate Sum of 1+2+...+N (Loop v.s Recursion)

Program to Calculate Sum of 1+2+...+N (Loop v.s Recursion)

824 views

3 years ago

Program to Print a 1D or 2D Array Using Recursion

Program to Print a 1D or 2D Array Using Recursion

2,429 views

3 years ago

Find the Length of an Array or List Using Recursion

Find the Length of an Array or List Using Recursion

1,492 views

3 years ago

Find All Divisors of a Number (For Loop v.s Recursion)

Find All Divisors of a Number (For Loop v.s Recursion)

3,349 views

3 years ago

Check if a Value Exists in an Array (For Loop v.s Recursion)

Check if a Value Exists in an Array (For Loop v.s Recursion)

1,666 views

3 years ago

Get Value at Specific Index of Array (Iterative v.s Recursive Way)

Get Value at Specific Index of Array (Iterative v.s Recursive Way)

679 views

3 years ago

How to Reverse String and Reverse Array (Iterative and Recursive)

How to Reverse String and Reverse Array (Iterative and Recursive)

1,426 views

3 years ago

Find Minimum and Maximum Number in Array (Iterative and Recursive)

Find Minimum and Maximum Number in Array (Iterative and Recursive)

11,890 views

3 years ago

Math for High School Students!

Can you find the area of the square?

Can you find the area of the square?

65 views

1 day ago

Prime Factorization to find GCD and LCM of two numbers! (So easy!)

Prime Factorization to find GCD and LCM of two numbers! (So easy!)

4,948 views

1 year ago

Prime Factorization Explained in 2 Minutes!

Prime Factorization Explained in 2 Minutes!

328 views

1 year ago

Deriving the Quadratic Formula (Proof Video)

Deriving the Quadratic Formula (Proof Video)

959 views

1 year ago

What is a Theorem, Corollary, Conjecture, Lemma, Axiom, and Proposition?

What is a Theorem, Corollary, Conjecture, Lemma, Axiom, and Proposition?

19,250 views

2 years ago

Pythagorean Theorem Made Easy!

Pythagorean Theorem Made Easy!

1,053 views

5 years ago

Synthetic Division of Polynomials | The Easy Way

Synthetic Division of Polynomials | The Easy Way

799 views

5 years ago

Long Division With Polynomials - The Easy Way!

Long Division With Polynomials - The Easy Way!

983 views

5 years ago

Find the Central Angles, Arc Lengths, and Radius

Find the Central Angles, Arc Lengths, and Radius

5,524 views

5 years ago

Radians and Degrees Conversion | The Easy Way

Radians and Degrees Conversion | The Easy Way

698 views

5 years ago

Complete the Square | Vertex Form of Quadratic Equations

Complete the Square | Vertex Form of Quadratic Equations

535 views

5 years ago

The Discriminant in 4 minutes

The Discriminant in 4 minutes

579 views

5 years ago

Math for Middle School Students!

Celsius to Fahrenheit Conversion | The Easy Way

Celsius to Fahrenheit Conversion | The Easy Way

79,597 views

5 years ago

Celsius to Kelvin Temperature Conversion | The Easy Way

Celsius to Kelvin Temperature Conversion | The Easy Way

10,870 views

5 years ago

Find the Area and Perimeter of Rectangles

Find the Area and Perimeter of Rectangles

1,712 views

5 years ago

Find the Area and Perimeter of Squares

Find the Area and Perimeter of Squares

9,035 views

5 years ago

Find the Area and Perimeter of Right Triangles

Find the Area and Perimeter of Right Triangles

2,464 views

5 years ago

Find the Area and Circumference of Circles

Find the Area and Circumference of Circles

484 views

5 years ago

Find the Perimeter and Area of Parallelograms!

Find the Perimeter and Area of Parallelograms!

68,616 views

5 years ago

Find the Area of Oblique (Non-Right) Triangles!

Find the Area of Oblique (Non-Right) Triangles!

3,445 views

5 years ago

Pythagorean Theorem Made Easy!

Pythagorean Theorem Made Easy!

1,053 views

5 years ago

Find the Perimeter and Area of Trapezoids!

Find the Perimeter and Area of Trapezoids!

13,297 views

5 years ago

Find the Perimeter and the Area of Kites

Find the Perimeter and the Area of Kites

19,412 views

5 years ago

Find the Surface Area and Volume of Cubes!

Find the Surface Area and Volume of Cubes!

1,086 views

5 years ago

1. Two Sum - Leetcode (Python)

1. Two Sum - Leetcode (Python)

15,186 views

2 years ago

9. Palindrome Number - Leetcode (Python)

9. Palindrome Number - Leetcode (Python)

16,337 views

2 years ago

125. Valid Palindrome - Leetcode (Python)

125. Valid Palindrome - Leetcode (Python)

1,719 views

2 years ago

242. Valid Anagram - Leetcode (Python)

242. Valid Anagram - Leetcode (Python)

1,577 views

2 years ago

3005. Count Elements with Maximum Frequency (Python) | Leetcode

3005. Count Elements with Maximum Frequency (Python) | Leetcode

611 views

1 year ago

26. Remove Duplicates from Sorted Array (Python) | Leetcode

26. Remove Duplicates from Sorted Array (Python) | Leetcode

478 views

1 year ago

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