Where does the mark scheme get these numbers from?

  • Thread starter TheePhysicsStudent
  • Start date
  • Tags
    Numbers
  • #1
TheePhysicsStudent
21
17
Homework Statement
practicing some Trigonmetric identities and equations questions, and unsure how the mark scheme managed to reach what sin theta is equal to (Q 4B)
Relevant Equations
sin^2 x + cos^2 x =1
1710164531453.png
Q4B
1710164557584.png
Mark scheme
1710164643254.png
My working
 
Physics news on Phys.org
  • #2
NVM guys, i just realised that the quadratic formula was used! Sorry for anyone who may have wasted time
 
  • #3
Your factorization, 3 lines from the bottom, is incorrect
The step from[Edit]
## Sin^2(\theta)+Sin(\theta)-1=0## , to
##Sin(\theta)[Sin(\theta)-1]=0##
Doesn't follow.
Distribute the terms in the bottom expression to test if they're equal.
 
Last edited:
  • Like
Likes SammyS and TheePhysicsStudent

FAQ: Where does the mark scheme get these numbers from?

How are the marks allocated in the mark scheme?

The marks are allocated based on a detailed rubric that outlines the specific criteria for each question. These criteria are developed by subject matter experts to ensure that they align with the learning objectives and standards of the curriculum.

Who creates the mark scheme?

The mark scheme is typically created by a team of experienced educators and examiners who have in-depth knowledge of the subject matter. They use their expertise to design a fair and comprehensive marking guide.

How is the difficulty level determined for each question?

The difficulty level is determined through a combination of past exam data, pilot testing, and expert judgment. This ensures that the questions are appropriately challenging and that the mark distribution reflects the expected performance range of the students.

Are the marks adjusted after the exams are taken?

Yes, marks can be adjusted after exams are taken through a process called standardization or moderation. This process involves reviewing a sample of student responses to ensure consistency and fairness in marking across different examiners and centers.

How do mark schemes ensure fairness and consistency?

Mark schemes ensure fairness and consistency through detailed guidelines, training for examiners, and regular quality checks. Examiners are trained to apply the mark scheme uniformly, and their marking is monitored to maintain high standards of reliability and validity.

Back
Top