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

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

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integral of sin((nxpi)/2)

\int sin (\frac{n x π}{2}) d x

- \frac{2}{πn} cos (\frac{πn}{2} x) + C

Solution steps

\int sin (\frac{n x π}{2}) d x

\frac{n x π}{2} = \frac{nπ}{2} x

= \int sin (\frac{nπ}{2} x) d x

Apply u-substitution

: \int \frac{2 sin ( u )}{πn} d u

= \int \frac{2 sin ( 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 sin (u) d u

Use the common integral:

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

= \frac{2}{πn} (- cos (u))

Substitute back

u = \frac{nπ}{2} x

= \frac{2}{πn} (- cos (\frac{nπ}{2} x))

Simplify

= - \frac{2}{πn} cos (\frac{πn}{2} x)

Add a constant to the solution

= - \frac{2}{πn} cos (\frac{πn}{2} x) + C

y^{^{''}} + 3 y^{^{'}} + 2 y = cos (e^{x})

\int \frac{1}{x ^{2}} ln (3 x) d x

\frac{d y}{d x}, y = x e^{y}

x \to 6 - lim (sec (\frac{π x}{4}))

\frac{\partial}{\partial y} (2 x - 3 y)

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