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  1. C

    Differential equations

    Cool website
  2. C

    SDD(software design and development) help needed

    I am not sure what your background is? But maybe stackoverflow coud help. Just the appropiate tags so something like <error message> [vba]. You might be able find some resources on vba online like Udemy, youtube or Code Academy. I feel like I have seen some similar post before?
  3. C

    Intersection between 2 lines

    @HeeeHeee unfortunately I could not understand your question sin^-1 needs an argument you have not specified that. As result It is not clear what your are writing as a result sin^-1(x) is curve not a line. There is no guarantee there is close form solution mx + b = sin^-1(x) Edit try solvng...
  4. C

    Maths Advanced ASSESSMENT

    Perhaps you could have your results in a word doc with the histogram from excel. As well any calculations if any.
  5. C

    Graphs of cos^-1(cosx), cos(cos^-1(x)) , sin^-1(sinx) and sin(sin^-1(x))

    cos(cos^-1(x)), sin(sin^-1(x)) should be easy. Use the theorem f(f^-1(x)) = x. sin^-1(sinx), cos^-1(cosx) you need to examine by inspection to sketch and get the pattern. Use the theorem f^-1(f(x)) = x but this only holds for the domain of the sin^-1 / cos^-1 As an excerise try to prove the...
  6. C

    Can I get some help with questions?

    I had another look at the question. I was not unfortunately able to understand the other answers. Theorem: if A and B are independent then P(B|A') = P(B) # This is actually converse of what we are looking to prove. Anyhow. Proof: P(A)*P(B|A) + P(A')*P(B|A') = P(B) Let P(A) = p, let P(B) =...
  7. C

    WSU Chatter Thread

    There probably is some discord channel for UWS that you might be able to access to learn more about certain subjects and find resources. You might need to look at Facebook or other sites.
  8. C

    Year 7 History Test Sample: Ancient Past and Ancient Rome

    I am not to sure how you can prepare as the syllabus seems vague. https://educationstandards.nsw.edu.au/wps/portal/nesa/k-10/learning-areas/hsie/history-k-10/content/1088 Maybe what you could do is try make your own essay questions and try to answer them. Look at the HSC papers to get an idea...
  9. C

    Geometric Proving

    Stay well.
  10. C

    Geometric Proving

    What was the content that got remove if you don't mind me asking.
  11. C

    Can I get some help with questions?

    I think often inspection is the way to go. So maybe number of ones from 101-200 201-300 . . 801-900 You will need to consider separately 901-1000 1001-1100 1101-1150
  12. C

    perms and combs

    Assume cards of same character but different suit are different. That is club A, is different hearts A How many combinations are there of 5 cards with characters A, K, J? How many permutations are there of 5 cards with characters A, K, J?
  13. C

    perms and combs

    When you want combination you need to divide by number of positions. When you want permutation that is the number of arrangements you don't want to divide. n-number of objects r- number of objects selected nPr is generally used for permutation. nCr is generally used for combinations but can...
  14. C

    perms and combs

    When dealing with groups you are not going to care about order only what members a group consist of. In the case of equal size group: Let you say have a set of members L in group 1. and a set members K in group 2. It is also possible to have L in group 2 and K in group 1. Hence you divide...
  15. C

    [HELP] Windows 10 Notebook Reboots Itself

    Maybe check the BIOS settings. Or maybe some exevutable on the computer that is running and causing it to shutdown.
  16. C

    can some1 quick recap me on how to do such qs

    So if you have y = sin^-1(x) + cos^-1(x) Then dy/dx = 0. So you have a differential equation that you can solve. Another alternative would be draw triangles. So draw triangle with hypotenuse 1 and opposite side x for sin^-1(x) and hypotenuse 1 and adjacent side x for cos^-1(x). You will see...
  17. C

    can some1 quick recap me on how to do such qs

    I never heard of sin^-1 being defined for complex numbers. Cool
  18. C

    can some1 quick recap me on how to do such qs

    If the derivative is zero this means the function is constant. So once you plug in some point that is in the domain you will get the answer.
  19. C

    Want to confirm ans

    x(x^2-1) = x(x+1)(x-1) bounds from -1 to 1 pi integral (x^3 -x)^2 dx What your taking is the sum of an infinite number circles across the x-axis https://www.integral-calculator.com/ Can you confirm the answer
  20. C

    Trigonometry Question

    Draw the diagonal from the upper trapezium to point B.
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