← Review lab

What the student sent the question as it arrived, then each reading of it

OCR of the image GOOGLE_VISION

4) Eliminate 0 from the following: Hu i) H.W 1) x = 3 sec0, y = 4tan0 ii) x = 6cosec0, y = 8cot iii) x = 4cos0 - 5sin0, y = 4sin0 + 5cos iv) x = 5 + 6cosec0, y = 3 + 8cote v) 2x = 3 - 4tan0, 3y = 5 + 3sec0 5) If 2sin²0 + 3sin0 = 0, find the permissible ii) iii) iv) v)

The phone's own reading, which differs:

5) If 2sin'0 + 3sin = 0, find the permissible 2x =3- 4tan, 3y =5 + 3seco iv) x= 5+6cosec, y =3 + 8cot® v) iii) x= 4cos0 - 5sin, y= 4sin + 5cos iv) H ii) x 6cosec, y= 8cot iii) i) x= 3seco , y =4tan ii) 4) Eliminate 9 from the following:

The audit's reading of the question, which is what the Product AI judged against:

4) Eliminate \u03b8 from the following: i) x = 3 sec\u03b8, y = 4tan\u03b8 ii) x = 6 cosec\u03b8, y = 8cot\u03b8 iii) x = 4cos\u03b8 - 5sin\u03b8, y = 4sin\u03b8 + 5cos\u03b8 iv) x = 5 + 6 cosec\u03b8, y = 3 + 8cot\u03b8 v) 2x = 3 - 4tan\u03b8, 3y = 5 + 3sec\u03b8 5) If 2sin²\u03b8 + 3sin\u03b8 = 0, find the permissible

Audit's summary: The student asked for help with question 4, specifically part (iii), which involves eliminating theta from the given equations for x and y. The tutor guided the student through the process by multiplying x and y and then expanding the resulting expression. The tutor also referenced the algebraic identity a² - b² = (a-b)(a+b) to explain the expansion. The tutor's explanation and the student's understanding seem to be progressing well.

What the student sent the question as it arrived, then each reading of it

OCR of the image GOOGLE_VISION

4) Eliminate 0 from the following: Hu i) H.W 1) x = 3 sec0, y = 4tan0 ii) x = 6cosec0, y = 8cot iii) x = 4cos0 - 5sin0, y = 4sin0 + 5cos iv) x = 5 + 6cosec0, y = 3 + 8cote v) 2x = 3 - 4tan0, 3y = 5 + 3sec0 5) If 2sin²0 + 3sin0 = 0, find the permissible ii) iii) iv) v)

The phone's own reading, which differs:

5) If 2sin'0 + 3sin = 0, find the permissible 2x =3- 4tan, 3y =5 + 3seco iv) x= 5+6cosec, y =3 + 8cot® v) iii) x= 4cos0 - 5sin, y= 4sin + 5cos iv) H ii) x 6cosec, y= 8cot iii) i) x= 3seco , y =4tan ii) 4) Eliminate 9 from the following:

The audit's reading of the question, which is what the Product AI judged against:

4) Eliminate \u03b8 from the following: i) x = 3 sec\u03b8, y = 4tan\u03b8 ii) x = 6 cosec\u03b8, y = 8cot\u03b8 iii) x = 4cos\u03b8 - 5sin\u03b8, y = 4sin\u03b8 + 5cos\u03b8 iv) x = 5 + 6 cosec\u03b8, y = 3 + 8cot\u03b8 v) 2x = 3 - 4tan\u03b8, 3y = 5 + 3sec\u03b8 5) If 2sin²\u03b8 + 3sin\u03b8 = 0, find the permissible

Audit's summary: The student asked for help with question 4, specifically part (iii), which involves eliminating theta from the given equations for x and y. The tutor guided the student through the process by multiplying x and y and then expanding the resulting expression. The tutor also referenced the algebraic identity a² - b² = (a-b)(a+b) to explain the expansion. The tutor's explanation and the student's understanding seem to be progressing well.

Each verdict takes your own. Yours is stored against the stack's, so “where is it wrong most often” is a question with an answer.

1. Work is the right way up The whiteboard is oriented upright at 0 degrees.

   While Frame 1 has the image initially sideways, it is quickly rotated upright in Frame 2, and all subsequent working (Frames 4-9) is upright at 0 degrees.
   seen · 100% confident
2. Your view ok weak bad can’t tell
3. Writing is legible at video size Handwriting is clear, legible, and well-contrasted.

   The tutor uses bright colors (yellow, light blue, pink) against a dark canvas with clear spacing (Frames 4-9).
   seen · 95% confident
4. Your view ok weak bad can’t tell
5. The work fills the frame Not applicable to a board session
   seen
6. Nothing distracting in shot Not applicable to a board session
   seen
7. The student's problem is established The question is clearly visible at the top of the canvas.

   The uploaded question sheet showing problem 4(iii) is displayed clearly at the top in Frames 2-9.
   seen · 95% confident
8. Your view ok weak bad can’t tell
9. Work proceeds in followable steps Working builds sequentially down the board.

   The equations and formula reference accumulate in an organized manner from Frame 4 through Frame 9.
   seen · 90% confident
10. Your view ok weak bad can’t tell
11. It reaches an answer The solution is left incomplete with theta not eliminated.

    Frame 9 and the transcript stop after writing '16 cos^2 theta - 25 sin^2 theta', which leaves theta uneliminated and does not finish the problem.
    seen · 95% confident
12. Your view ok weak bad can’t tell
13. Something was actually written board went from 20.14% to a peak of 33.04% covered (+12.90 points), ending at 7.67%
    measured
14. Your view ok weak bad can’t tell
15. The concept is named before the working The tutor only mentions the algebraic difference of squares formula.

    The tutor asks 'Do you know the formula for minus b square?' in the transcript without explicitly introducing the overall method for eliminating trigonometric parameters.
    heard · 85% confident
16. Your view ok weak bad can’t tell
17. Explained rather than jumped to the answer The tutor jumps straight into multiplying expressions without setup.

    Right after confirming part (iii), the tutor immediately writes and speaks 'multiply x and y' (Frame 4, transcript).
    heard · 85% confident
18. Your view ok weak bad can’t tell
19. Solved step by step, not in one leap Steps are written sequentially but the method applied is mathematically flawed.

    Multiplying (4cosθ - 5sinθ)(4sinθ + 5cosθ) is erroneously treated as difference of squares (a-b)(a+b) in Frames 6-8 before abruptly ending.
    heard · 90% confident
20. Your view ok weak bad can’t tell
21. The session opens properly The tutor warmly greets the student and confirms the specific sub-question.

    The tutor says 'Hello good afternoon student welcome to Filo' and verifies problem 3 ('x is equal to 4 cos theta - 5 sin theta') as shown in the transcript.
    heard · 95% confident
22. Your view ok weak bad can’t tell
23. No long dead air 2 gaps over 6.0s, 14s total (6% of the session), longest 8s

    Silence is below -35.0dB — a crude measure on a phone microphone, so treat a low count as weak evidence rather than proof the tutor was talking.
    measured
24. Your view ok weak bad can’t tell

{
  "findings": [
    {
      "key": "orientation",
      "verdict": "ok",
      "headline": "The whiteboard is oriented upright at 0 degrees.",
      "evidence": "While Frame 1 has the image initially sideways, it is quickly rotated upright in Frame 2, and all subsequent working (Frames 4-9) is upright at 0 degrees.",
      "confidence": 1.0
    },
    {
      "key": "legibility",
      "verdict": "ok",
      "headline": "Handwriting is clear, legible, and well-contrasted.",
      "evidence": "The tutor uses bright colors (yellow, light blue, pink) against a dark canvas with clear spacing (Frames 4-9).",
      "confidence": 0.95
    },
    {
      "key": "question_captured",
      "verdict": "ok",
      "headline": "The question is clearly visible at the top of the canvas.",
      "evidence": "The uploaded question sheet showing problem 4(iii) is displayed clearly at the top in Frames 2-9.",
      "confidence": 0.95
    },
    {
      "key": "structure",
      "verdict": "ok",
      "headline": "Working builds sequentially down the board.",
      "evidence": "The equations and formula reference accumulate in an organized manner from Frame 4 through Frame 9.",
      "confidence": 0.9
    },
    {
      "key": "completion",
      "verdict": "bad",
      "headline": "The solution is left incomplete with theta not eliminated.",
      "evidence": "Frame 9 and the transcript stop after writing '16 cos^2 theta - 25 sin^2 theta', which leaves theta uneliminated and does not finish the problem.",
      "confidence": 0.95
    },
    {
      "key": "concept_named",
      "verdict": "weak",
      "headline": "The tutor only mentions the algebraic difference of squares formula.",
      "evidence": "The tutor asks 'Do you know the formula for minus b square?' in the transcript without explicitly introducing the overall method for eliminating trigonometric parameters.",
      "confidence": 0.85
    },
    {
      "key": "explained_before_solving",
      "verdict": "weak",
      "headline": "The tutor jumps straight into multiplying expressions without setup.",
      "evidence": "Right after confirming part (iii), the tutor immediately writes and speaks 'multiply x and y' (Frame 4, transcript).",
      "confidence": 0.85
    },
    {
      "key": "concept_checked",
      "verdict": "weak",
      "headline": "Questions asked are limited to formula recall and basic arithmetic.",
      "evidence": "The tutor asks 'Do you know the formula for minus b square?' and '4 का square कितना होगा?' (transcript), which only test basic formula recall and mental math rather than understanding.",
      "confidence": 0.85
    },
    {
      "key": "step_by_step",
      "verdict": "weak",
      "headline": "Steps are written sequentially but the method applied is mathematically flawed.",
      "evidence": "Multiplying (4cosθ - 5sinθ)(4sinθ + 5cosθ) is erroneously treated as difference of squares (a-b)(a+b) in Frames 6-8 before abruptly ending.",
      "confidence": 0.9
    },
    {
      "key": "opening",
      "verdict": "ok",
      "headline": "The tutor warmly greets the student and confirms the specific sub-question.",
      "evidence": "The tutor says 'Hello good afternoon student welcome to Filo' and verifies problem 3 ('x is equal to 4 cos theta - 5 sin theta') as shown in the transcript.",
      "confidence": 0.95
    }
  ]
}

Frames in order, one every ~27s