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Hey guys, just needed help with two questions, any help would be appreciated

1. a radar antenna on a ship tha tis 4km from a straight shoreline revolves at 32 rev/min. How fast is the radar beam moving along the shore line when the beam makes an angle of 30° with the shore? Give an exact value answer.

http://illusionpixels.com/dt/diagram.jpg [Broken]

tan 30 = x/4

4tan30 = x

4(sec^2 30)dy/dt = dx/dt

4(sec^2 30)(64pi) = dx/dt

= 1072.330292m/min

2. Sketch the graph of y = x + sin(x), showing derivative, intervals of increase and decrease, points of inflection, concavity, etc. Use exact values

i kno its stated in the rules that ur supposed to show what u did and all that stuff but for this questions im not even sure where or how to start

any help would be appreciated...thx in advanced

1. a radar antenna on a ship tha tis 4km from a straight shoreline revolves at 32 rev/min. How fast is the radar beam moving along the shore line when the beam makes an angle of 30° with the shore? Give an exact value answer.

http://illusionpixels.com/dt/diagram.jpg [Broken]

tan 30 = x/4

4tan30 = x

4(sec^2 30)dy/dt = dx/dt

4(sec^2 30)(64pi) = dx/dt

= 1072.330292m/min

2. Sketch the graph of y = x + sin(x), showing derivative, intervals of increase and decrease, points of inflection, concavity, etc. Use exact values

i kno its stated in the rules that ur supposed to show what u did and all that stuff but for this questions im not even sure where or how to start

any help would be appreciated...thx in advanced

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