cos(3x)-3xsin(3x)=0

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Solution for cos(3x)-3xsin(3x)=0 equation:


Simplifying
cos(3x) + -3xsin(3x) = 0

Remove parenthesis around (3x)
cos * 3x + -3xsin(3x) = 0

Reorder the terms for easier multiplication:
3cos * x + -3xsin(3x) = 0

Multiply cos * x
3cosx + -3xsin(3x) = 0

Remove parenthesis around (3x)
3cosx + -3insx * 3x = 0

Reorder the terms for easier multiplication:
3cosx + -3 * 3insx * x = 0

Multiply -3 * 3
3cosx + -9insx * x = 0

Multiply insx * x
3cosx + -9insx2 = 0

Solving
3cosx + -9insx2 = 0

Solving for variable 'c'.

Move all terms containing c to the left, all other terms to the right.

Add '9insx2' to each side of the equation.
3cosx + -9insx2 + 9insx2 = 0 + 9insx2

Combine like terms: -9insx2 + 9insx2 = 0
3cosx + 0 = 0 + 9insx2
3cosx = 0 + 9insx2
Remove the zero:
3cosx = 9insx2

Divide each side by '3osx'.
c = 3ino-1x

Simplifying
c = 3ino-1x

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