sin(5x)cos(9x)-cos(5x)sin(9x)=-0.4

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Solution for sin(5x)cos(9x)-cos(5x)sin(9x)=-0.4 equation:


Simplifying
sin(5x) * cos(9x) + -1cos(5x) * sin(9x) = -0.4

Remove parenthesis around (5x)
ins * 5x * cos(9x) + -1cos(5x) * sin(9x) = -0.4

Remove parenthesis around (9x)
ins * 5x * cos * 9x + -1cos(5x) * sin(9x) = -0.4

Reorder the terms for easier multiplication:
5 * 9ins * x * cos * x + -1cos(5x) * sin(9x) = -0.4

Multiply 5 * 9
45ins * x * cos * x + -1cos(5x) * sin(9x) = -0.4

Multiply ins * x
45insx * cos * x + -1cos(5x) * sin(9x) = -0.4

Multiply insx * cos
45cinos2x * x + -1cos(5x) * sin(9x) = -0.4

Multiply cinos2x * x
45cinos2x2 + -1cos(5x) * sin(9x) = -0.4

Remove parenthesis around (5x)
45cinos2x2 + -1cos * 5x * sin(9x) = -0.4

Remove parenthesis around (9x)
45cinos2x2 + -1cos * 5x * ins * 9x = -0.4

Reorder the terms for easier multiplication:
45cinos2x2 + -1 * 5 * 9cos * x * ins * x = -0.4

Multiply -1 * 5
45cinos2x2 + -5 * 9cos * x * ins * x = -0.4

Multiply -5 * 9
45cinos2x2 + -45cos * x * ins * x = -0.4

Multiply cos * x
45cinos2x2 + -45cosx * ins * x = -0.4

Multiply cosx * ins
45cinos2x2 + -45cinos2x * x = -0.4

Multiply cinos2x * x
45cinos2x2 + -45cinos2x2 = -0.4

Combine like terms: 45cinos2x2 + -45cinos2x2 = 0
0 = -0.4

Solving
0 = -0.4

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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