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OpenStudy (anonymous):
find the exact value: sin theta = -0.4, pi is less than theta and theta is less than 3pi/2
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OpenStudy (anonymous):
use a calculator, only way
OpenStudy (anonymous):
\[\arcsin(-.4)\] which will land you in quadrant 4, you need to add \(\pi\) to the result to put in in the right interval
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