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OpenStudy (deleonbrrj):
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OpenStudy (deleonbrrj):
\[(-cosec 3\Pi/4)-(-cosec \Pi/4) ???\]
OpenStudy (anonymous):
\[sin{(3\pi/4)}=1/\sqrt{2}\] \[sin{(\pi/4)}=1/\sqrt{2}\] \[-1/\sqrt{2}-(-1/\sqrt{2})=0\]
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