y(t)=5+10cos(30t)+15cos(90t)

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Solution for y(t)=5+10cos(30t)+15cos(90t) equation:


Simplifying
y(t) = 5 + 10cos(30t) + 15cos(90t)

Multiply y * t
ty = 5 + 10cos(30t) + 15cos(90t)

Remove parenthesis around (30t)
ty = 5 + 10cos * 30t + 15cos(90t)

Reorder the terms for easier multiplication:
ty = 5 + 10 * 30cos * t + 15cos(90t)

Multiply 10 * 30
ty = 5 + 300cos * t + 15cos(90t)

Multiply cos * t
ty = 5 + 300cost + 15cos(90t)

Remove parenthesis around (90t)
ty = 5 + 300cost + 15cos * 90t

Reorder the terms for easier multiplication:
ty = 5 + 300cost + 15 * 90cos * t

Multiply 15 * 90
ty = 5 + 300cost + 1350cos * t

Multiply cos * t
ty = 5 + 300cost + 1350cost

Combine like terms: 300cost + 1350cost = 1650cost
ty = 5 + 1650cost

Solving
ty = 5 + 1650cost

Solving for variable 't'.

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

Add '-1650cost' to each side of the equation.
-1650cost + ty = 5 + 1650cost + -1650cost

Combine like terms: 1650cost + -1650cost = 0
-1650cost + ty = 5 + 0
-1650cost + ty = 5

Reorder the terms:
-5 + -1650cost + ty = 5 + -5

Combine like terms: 5 + -5 = 0
-5 + -1650cost + ty = 0

The solution to this equation could not be determined.

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