3.4=-9cos(120t-90)

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Solution for 3.4=-9cos(120t-90) equation:


Simplifying
3.4 = -9cos(120t + -90)

Reorder the terms:
3.4 = -9cos(-90 + 120t)
3.4 = (-90 * -9cos + 120t * -9cos)
3.4 = (810cos + -1080cost)

Solving
3.4 = 810cos + -1080cost

Solving for variable 'c'.

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

Add '-810cos' to each side of the equation.
3.4 + -810cos = 810cos + -810cos + -1080cost

Combine like terms: 810cos + -810cos = 0
3.4 + -810cos = 0 + -1080cost
3.4 + -810cos = -1080cost

Add '1080cost' to each side of the equation.
3.4 + -810cos + 1080cost = -1080cost + 1080cost

Combine like terms: -1080cost + 1080cost = 0
3.4 + -810cos + 1080cost = 0

Add '-3.4' to each side of the equation.
3.4 + -810cos + -3.4 + 1080cost = 0 + -3.4

Reorder the terms:
3.4 + -3.4 + -810cos + 1080cost = 0 + -3.4

Combine like terms: 3.4 + -3.4 = 0.0
0.0 + -810cos + 1080cost = 0 + -3.4
-810cos + 1080cost = 0 + -3.4

Combine like terms: 0 + -3.4 = -3.4
-810cos + 1080cost = -3.4

Reorder the terms:
3.4 + -810cos + 1080cost = -3.4 + 3.4

Combine like terms: -3.4 + 3.4 = 0.0
3.4 + -810cos + 1080cost = 0.0

The solution to this equation could not be determined.

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