SOLUTION: Convert to degree measure: (a)pi/2 (b)-7pi/4 Please I need help! Thanks!

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Question 852891: Convert to degree measure:
(a)pi/2
(b)-7pi/4
Please I need help! Thanks!
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
(a)pi/2



Multiply by 180/pi to get


(pi/2)*(180/pi)


(pi*180)/(2*pi)


180/2 ... the 'pi' terms cancel


90


So pi/2 radians = 90 degrees


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(b)-7pi/4



Multiply by 180/pi to get


(-7pi/4)*(180/pi)


(-7pi*180)/(4*pi)


(-7*180)/4 ... the 'pi' terms cancel


-1260/4


-315


So -7pi/4 radians = -315 degrees