What is the integral of cos((nxpi)/2) ?

The integral of cos((nxpi)/2) is 2/(pin)sin((nxpi)/2)+C

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integral of cos((nxpi)/2)

\int cos (\frac{n x π}{2}) d x

\frac{2}{πn} sin (\frac{n x π}{2}) + C

Solution steps

\int cos (\frac{n x π}{2}) d x

Apply u-substitution

: \int \frac{2 cos ( u )}{πn} d u

= \int \frac{2 cos ( u )}{πn} d u

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= \frac{2}{πn} \cdot \int cos (u) d u

Use the common integral:

\int cos (u) d u = sin (u)

= \frac{2}{πn} sin (u)

Substitute back

u = \frac{n x π}{2}

= \frac{2}{πn} sin (\frac{n x π}{2})

Add a constant to the solution

= \frac{2}{πn} sin (\frac{n x π}{2}) + C

\frac{d}{d x} (2 \cdot c \cdot x - x^{2})

\frac{d}{d x} (e^{- x} sin (y))

\frac{d}{d x} (e^{- 18 x})

\frac{\partial}{\partial x} (4 + x^{2})

\frac{d}{d x} (e^{- x} - e^{x} x)

What is the integral of cos((nxpi)/2) ?
The integral of cos((nxpi)/2) is 2/(pin)sin((nxpi)/2)+C