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OpenStudy (anonymous):
Find Exact value of Sin^-1(sin(5pi/7)) do not use a calculator
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myininaya (myininaya):
so first of all 5 pi/7 is not between -pi/2 and pi/2 we need to find a value so that sin(?)=sin(5pi/7) where ? is between -pi/2 and pi/2
myininaya (myininaya):
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