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    M2 QUESTION
    A particle is projected from a point O on horizontal ground. The velocity of projection has magnitude 20ms^(-1) and direction upwards at an angle theta to the horizontal. The particle passes through the point 7m above the ground and 16m horizontally from O, and hits the ground at the point A.

    i) Using the equation of the particle's trajectory and the identity sec^(2)=1+tan^(2), show that the possible values of tan theta are 3/4 and 17/4

    ii) Find the distance of OA for each of the two possible values of tan theta

    iii) Sketch in the same diagram the two possible trajectories

    S1 QUESTION

    There are 12 people at an identification parade. Three witnesses are called to identify the accused person. Assuming they make their choice purely by random selection, draw a tree diagram showing the possible events

    i) From the tree diagram, calculate the following possibilities

    (a) that all three witnesses select the accused person

    (b) that none of the witnesses selects the accused person

    (c)at least two of the witnesses selects the accused person

    (ii) Suppose now that by changing the composition of people in the identification parade, the first two witnesses increase their chances of selecting the accused person to 0.25.
    Draw a tree diagram and calculate the possibilities

    (a) that all three witnesses select the accused person

    (b) that none of the witnesses selects the accused person

    (c)at least two of the witnesses selects the accused person
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    (Original post by Asazycat)
    ...
    Have a go at these yourself first. What are you thoughts?
    Post your working if you get stuck at any point.
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    (Original post by RDKGames)
    Have a go at these yourself first. What are you thoughts?
    Post your working if you get stuck at any point.
    I got most of the parts rights.
    It is just I am stuck on the last part of the stats question and the second part of the mech question
 
 
 
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