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  1. Lith_30

    Physics predictions?

    I think the question asked about how the SYSTEM of the iss and capsule could evaluate the hypothesis, so i guess they wanted us to consider those two only rather than consider the Earth at all.
  2. Lith_30

    vector application qn

    Imagine jacques's swim velocity as a vector of magnitude 1.5, and the current as a vector of magnitude 0.5. This question is basically asking what direction should jacques swim such that the two vectors add to become a vector perpendicular to the bank. something like this
  3. Lith_30

    Integration question

    for question 4 we are trying to find \int^{4}_{-4}f(x+3)dx as we know f(x+3) is basically f(x) shifted 3 units to the left, hence we can say that \int^{7}_{-1}f(x)dx=\int^{4}_{-4}f(x+3)dx or we can use the substitution u=x+3 to show the same thing now we can split \int^{7}_{-1}f(x)dx into...
  4. Lith_30

    MYOB Case Study

    Looks at the software, hardware, data, procedures and personnel of MYOB. I think it is alright.
  5. Lith_30

    mc question

    the wavelength of light is \frac{3\times10^8}{5.36\times10^{14}}=559.70149...\times10^{-9} so basically the path difference is just the wavelength so there would be no change, hence B.
  6. Lith_30

    How I overcame 5 years of depression in 5 minutes.

    I heard they were making extra chapters for Solo Leveling a while back, but haven't checked at all. Also rip to Dubu, Solo Levelling was the first good manhuwa that I ever read, I will forever remember it. I see tessia is more your type.
  7. Lith_30

    How I overcame 5 years of depression in 5 minutes.

    oooh, so you were imagining sangah what happened to cha hae in?? 😬
  8. Lith_30

    Binomial

    Think of the pascal triangle and lets see if we can develop some patterns, as the pascal triangle can be developed through the combinations. as we can see, each of the numbers in the pascal triangle can be generated by adding the two numbers closest to it in the row above. ie 1+1=2, 1+2=3...
  9. Lith_30

    Complex numbers from cambridge

    using the identity z\bar{z}=|z|^2 \begin{align*}\text{LHS}^2&=|z_1z_2+z_1z_3+z_2z_3|^2\\&=(z_1z_2+z_1z_3+z_2z_3)\overline{(z_1z_2+z_1z_3+z_2z_3)}\\&=|z_1|^2|z_2|^2+|z_1|^2z_2\bar{z_3}+z_1|z_2|^2\bar{z_2}+|z_1|^2\bar{z_2}z_3+|z_1|^2|z_3|^2+z_1\bar{z_2}|z_3|^2+\bar{z_1}|z_2|^2z_3+\bar...
  10. Lith_30

    complex2 q

    yeah the roots would be \pm\cos\left(\frac{\pi}{12}\right),\pm\cos\left(\frac{5\pi}{12}\right),\pm\frac{1}{\sqrt{2}} lets say you start off with \cos\left(\frac{\pi}{12}\right) multiplying with \pm\cos\left(\frac{5\pi}{12}\right),\pm\frac{1}{\sqrt{2}} and then -\cos\left(\frac{\pi}{12}\right)...
  11. Lith_30

    complex2 q

    use the sum to product of pairs of roots to show that \cos^2\left(\frac{\pi}{12}\right)+\cos^2\left(\frac{5\pi}{12}\right)=1 then use the fact that 2\cos\left(\frac{\pi}{12}\right)\cos^2\left(\frac{5\pi}{12}\right)=\frac{1}{2} to find...
  12. Lith_30

    GOOD LUCK

    let's just get this shit done with
  13. Lith_30

    damn, pretty cool also the hype for chainsaw man anime is crazy, will probably watch it after...

    damn, pretty cool also the hype for chainsaw man anime is crazy, will probably watch it after the hsc tho 😔
  14. Lith_30

    I'll be waiting until the day I can guess the colour of your Bugatti 🤑

    I'll be waiting until the day I can guess the colour of your Bugatti 🤑
  15. Lith_30

    still waiting for the main storyline to start I see

    still waiting for the main storyline to start I see
  16. Lith_30

    I will get better, once the hsc is over (especially after english)

    I will get better, once the hsc is over (especially after english)
  17. Lith_30

    thankyou it represents my constant unhappiness

    thankyou it represents my constant unhappiness
  18. Lith_30

    What manhwa are you reading rn?

    What manhwa are you reading rn?
  19. Lith_30

    Locus centre

    the general equation of a circle is (x+a)^2+(y+b)^2=r^2 hence we will need at least 3 points to get an equation, we already have two. We can find another point by using the triangle ADC which is a right angle cause D is the midpoint of AB (x=-1) and angle CAD is \frac{\pi}{6} using trig we can...
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