What is the integral of 7/3 cos(1/3 x)-2sin(2/3 x) ?

The integral of 7/3 cos(1/3 x)-2sin(2/3 x) is 7sin(1/3 x)+3cos((2x)/3)+C

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integral of 7/3 cos(1/3 x)-2sin(2/3 x)

\int \frac{7}{3} cos (\frac{1}{3} x) - 2 sin (\frac{2}{3} x) d x

7 sin (\frac{1}{3} x) + 3 cos (\frac{2 x}{3}) + C

Solution steps

\int \frac{7}{3} cos (\frac{1}{3} x) - 2 sin (\frac{2}{3} x) d x

Apply the Sum Rule:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= \int \frac{7}{3} cos (\frac{1}{3} x) d x - \int 2 sin (\frac{2}{3} x) d x

\int \frac{7}{3} cos (\frac{1}{3} x) d x = 7 sin (\frac{1}{3} x)

\int 2 sin (\frac{2}{3} x) d x = - 3 cos (\frac{2 x}{3})

= 7 sin (\frac{1}{3} x) - (- 3 cos (\frac{2 x}{3}))

Simplify

= 7 sin (\frac{1}{3} x) + 3 cos (\frac{2 x}{3})

Add a constant to the solution

= 7 sin (\frac{1}{3} x) + 3 cos (\frac{2 x}{3}) + C

What is the integral of 7/3 cos(1/3 x)-2sin(2/3 x) ?
The integral of 7/3 cos(1/3 x)-2sin(2/3 x) is 7sin(1/3 x)+3cos((2x)/3)+C