Evaluate
\frac{\sqrt{2}}{2}\approx 0.707106781
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1\cos(45)
Use the property \cos(-x)=\cos(x).
1\times \frac{\sqrt{2}}{2}
Get the value of \cos(45) from trigonometric values table.
\frac{\sqrt{2}}{2}
Express 1\times \frac{\sqrt{2}}{2} as a single fraction.
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