Strategies for solving questions related to vectors and 3D geometry in the mathematics section of the JEE Advanced exam:

1. Understand the Concepts:
- Make sure you have a thorough understanding of the basic concepts of vectors and 3D geometry.
- Familiarize yourself with vector operations such as addition, subtraction, scalar multiplication, dot product, cross product, etc.
- Understand the equations of planes, lines, and other geometric shapes in 3D space.

2. Practice with Varied Question Types:
- Solve a wide range of questions from previous years' JEE Advanced papers, sample papers, and other practice materials.
- Practice different types of questions including those involving finding angles between vectors, finding equations of lines and planes, calculating distances, etc.
- Pay attention to the different approaches and techniques used to solve each type of question.

3. Visualize the Problems:
- Develop the ability to visualize vectors and 3D shapes in your mind.
- Draw diagrams whenever possible to aid your understanding of the problem.
- Use the right-hand rule to determine the direction of the cross product or the normal vector of a plane.

4. Break Down Complex Problems:
- If a question seems complex, break it down into smaller, more manageable parts.
- Identify what information is given and what needs to be found.
- Use the properties and formulas of vectors and 3D geometry to simplify the problem.

5. Apply Algebraic Manipulation:
- Use algebraic manipulation techniques to simplify vector equations or expressions.
- Expand and simplify expressions using the properties of vectors.
- Use vector identities and properties to manipulate equations and solve for unknowns.

6. Use Geometric Properties:
- Make use of geometric properties and relationships between vectors and shapes in 3D space.
- Understand the geometric interpretations of dot product, cross product, and other vector operations.
- Apply the properties of parallel and perpendicular lines, collinearity, coplanarity, etc., to solve problems.

7. Revise Important Formulas:
- Memorize and revise the important formulas, theorems, and properties related to vectors and 3D geometry.
- This will help you quickly recall and apply the necessary formulas during the exam.

8. Time Management:
- Since the JEE Advanced exam has time constraints, practice solving questions within the given time frame.
- Develop time management skills by attempting timed mock tests and analyzing your performance.

Remember, consistent practice and understanding of the concepts are key to mastering vector and 3D geometry questions in the JEE Advanced exam.