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  • 27 May 2024
    Barbara Kušar
    Vectors HL
    Dear Tim, regarding solution a=0 problem 3d, Test # 1, you are right it is not the solution to equation 1/2 = (a-1)/sqrt(2aa + 4), but shouldn't there be an absolute value when calculating the angle beetwen a line and a plane to ensure an acute...
  • 13 May 2024
    Tim Garry
    Integration basics
    Hi Vipul, Thank you for pointing this out. The exercise set with integration exam-like questions should not have been categorized as suitable for SL because - as you stated - solids of revolution are not in the SL syllabus. I have re-categorized...
  • 13 May 2024
    vipul patel
    Integration basics
    Hi, For AA_SL_5.10_integration_exam like questions, there is a question on volume of solid revolution. However, this is no longer on the syllabus. 
  • Hi Tim, that helps massively, thank you.