Alan

Depends on the instrument used to do the measuring!

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Use atan (press 2nd followed by atan).  atan is the same as tan^-1

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Start by finding the values of Ra and Rb.  

Ra + Rb = sum of downward forces.

Take moments about, say, Ra to find Rb (then you can find Ra).

dV(x)/dx = -w(x)   where w(x) is the load distribution (i.e. the kN/m terms), so integrate to get V(x), noting that there will be a discontinuity at the point load.

dM(x)/dx = V(x), so integrate V(x) to get M(x), again noting there will be discontinuities at the separately applied moments.

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Average speed = total distance/total time = 4 miles/12 minutes = 4 miles/(12/60 hours) = 20 miles/hour

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This is undefined in mathematics. 

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There are a lot more 9's in the 359.9... than there are 0's in the 360.0..., so 359.9999...... is closer to 360 than 360.000...etc.

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Use asin, which is the same thing (press 2nd then asin)

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Haven't you missed out a decimal place in each number?!!!

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