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Solving integrals/ cos7x*cos9x

Integral of cos7x*cos9x dx

Limits of integration:

from to
v

The graph:

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Piecewise:

The solution

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 |  cos(7*x)*cos(9*x) dx
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$$\int\limits_{0}^{1} \cos{\left(7 x \right)} \cos{\left(9 x \right)}\, dx$$ 
Integral(cos(7*x)*cos(9*x), (x, 0, 1))
The graph
Plot the graph f(x)
The answer [src] 
  7*cos(9)*sin(7)   9*cos(7)*sin(9)
- --------------- + ---------------
         32                32
$$\frac{9 \sin{\left(9 \right)} \cos{\left(7 \right)}}{32} - \frac{7 \sin{\left(7 \right)} \cos{\left(9 \right)}}{32}$$ 
=
= 
  7*cos(9)*sin(7)   9*cos(7)*sin(9)
- --------------- + ---------------
         32                32
$$\frac{9 \sin{\left(9 \right)} \cos{\left(7 \right)}}{32} - \frac{7 \sin{\left(7 \right)} \cos{\left(9 \right)}}{32}$$ 
-7*cos(9)*sin(7)/32 + 9*cos(7)*sin(9)/32
Numerical answer [src] 
0.218327378060637
0.218327378060637

    Use the examples entering the upper and lower limits of integration.

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