Evaluate
\frac{\sqrt{2}}{2}-1\approx -0.292893219
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\frac{\sqrt{2}}{2}-1
Get the value of \cos(\frac{\pi }{4}) from trigonometric values table.
\frac{\sqrt{2}}{2}-\frac{2}{2}
To add or subtract expressions, expand them to make their denominators the same. Multiply 1 times \frac{2}{2}.
\frac{\sqrt{2}-2}{2}
Since \frac{\sqrt{2}}{2} and \frac{2}{2} have the same denominator, subtract them by subtracting their numerators.
Examples
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Matrix
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Simultaneous equation
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Differentiation
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Integration
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Limits
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