21sin(t)cos(t)=-9cos(t)

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Solution for 21sin(t)cos(t)=-9cos(t) equation:


Simplifying
21sin(t) * cos(t) = -9cos(t)

Multiply ins * t
21inst * cos * t = -9cos(t)

Multiply inst * cos
21cinos2t * t = -9cos(t)

Multiply cinos2t * t
21cinos2t2 = -9cos(t)

Multiply cos * t
21cinos2t2 = -9cost

Solving
21cinos2t2 = -9cost

Solving for variable 'c'.

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

Add '9cost' to each side of the equation.
21cinos2t2 + 9cost = -9cost + 9cost

Combine like terms: -9cost + 9cost = 0
21cinos2t2 + 9cost = 0

Factor out the Greatest Common Factor (GCF), '3cost'.
3cost(7inst + 3) = 0

Ignore the factor 3.

Subproblem 1

Set the factor 'cost' equal to zero and attempt to solve: Simplifying cost = 0 Solving cost = 0 Move all terms containing c to the left, all other terms to the right. Simplifying cost = 0 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined.

Subproblem 2

Set the factor '(7inst + 3)' equal to zero and attempt to solve: Simplifying 7inst + 3 = 0 Reorder the terms: 3 + 7inst = 0 Solving 3 + 7inst = 0 Move all terms containing c to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + 7inst = 0 + -3 Combine like terms: 3 + -3 = 0 0 + 7inst = 0 + -3 7inst = 0 + -3 Combine like terms: 0 + -3 = -3 7inst = -3 Add '-7inst' to each side of the equation. 7inst + -7inst = -3 + -7inst Combine like terms: 7inst + -7inst = 0 0 = -3 + -7inst Simplifying 0 = -3 + -7inst The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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