Evaluate
\frac{5\pi }{8}\approx 1.963495408
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\frac{2\pi }{8}+\frac{3\pi }{8}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 4 and 8 is 8. Multiply \frac{\pi }{4} times \frac{2}{2}.
\frac{2\pi +3\pi }{8}
Since \frac{2\pi }{8} and \frac{3\pi }{8} have the same denominator, add them by adding their numerators.
\frac{5\pi }{8}
Combine like terms in 2\pi +3\pi .
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
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Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
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Limits
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