part A) check the picture below.
part B)
hmmm, between 0 and 2 radians I take it, it means.
[tex]\bf \textit{if you go around the circle once, you've covered }2\pi
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\textit{if you around 5 times, you've covered }5\cdot 2\pi \implies 10\pi \\\\
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\cfrac{11\pi }{2}\implies 5\frac{\pi }{2}\implies 5\pi \frac{\pi }{2}\implies 5\pi +\frac{\pi }{2}[/tex]
so... 11π/2 is really just going around the circle 5 times, and then adding π/2, now, these are positive angles btw, so we're going counter-clockwise.
so.. where would that land you at? well at π/2, since going around the circle once will land you back at 0, and doing it 5 times lands you back at 0 5 times, and then you add the extra π/2.
now, is π/2 a coterminal angle between 0 and 2 radians? well, [tex]\bf \cfrac{\pi }{2}\implies \pi \div 2\approx 1.57[/tex].
