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  1. K

    Suppose a 10 kg opus was shot straight up with an initial velocity of +50m/s...?

    1. Assuming that all his initial kinetic energy was transformed into gravitation energy, what is the maximum height he could reach? 2. Suppose that 20% of his inital kinetic energy were lost due to friction with the air ( air resistance). What is the maximum height he could reach...
  2. K

    simplify and write the trig expression in terms of sine and cosine?

    sinx+cotxcosc=1/f(x)
  3. K

    simplify and write the trig expression in terms of sine and cosine?

    i don't get what this means! (1-cosy)(1+cosy)=(f(y))^2 f(y)=? (2+tan^2x)/(sec^2x)-1=(f(x))^2 f(x)=?
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