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\frac{\sqrt{2}}{2}-\cos(\frac{\pi }{4})
Get the value of \sin(\frac{\pi }{4}) from trigonometric values table.
\frac{\sqrt{2}}{2}-\frac{\sqrt{2}}{2}
Get the value of \cos(\frac{\pi }{4}) from trigonometric values table.
0
Combine \frac{\sqrt{2}}{2} and -\frac{\sqrt{2}}{2} to get 0.
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