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3.87sin((2pi(t+101.75))/(365))+11.7=14

Solution

3.87 sin (\frac{2 π ( t + 101.75 )}{365}) + 11.7 = 14

Solution

t = \frac{365 \cdot 0.63641 \dots}{2 π} + 365 n - 101.75, t = \frac{365}{2} - \frac{365 \cdot 0.63641 \dots}{2 π} + 365 n - 101.75

Degrees

t = - 3711.60484 \dots^{\circ} + 20912.95952 \dots^{\circ} n, t = 2508.39347 \dots^{\circ} + 20912.95952 \dots^{\circ} n

Solution steps

3.87 sin (\frac{2 π ( t + 101.75 )}{365}) + 11.7 = 14

Multiply both sides by

100

3.87 sin (\frac{2 π ( t + 101.75 )}{365}) + 11.7 = 14

To eliminate decimal points, multiply by 10 for every digit after the decimal pointThere are

2

digits to the right of the decimal point, therefore multiply by

100

3.87 sin (\frac{2 π ( t + 101.75 )}{365}) \cdot 100 + 11.7 \cdot 100 = 14 \cdot 100

Refine

387 sin (\frac{2 π ( t + 101.75 )}{365}) + 1170 = 1400

387 sin (\frac{2 π ( t + 101.75 )}{365}) + 1170 = 1400

Move

1170

to the right side

387 sin (\frac{2 π ( t + 101.75 )}{365}) + 1170 = 1400

Subtract

1170

from both sides

387 sin (\frac{2 π ( t + 101.75 )}{365}) + 1170 - 1170 = 1400 - 1170

Simplify

387 sin (\frac{2 π ( t + 101.75 )}{365}) = 230

387 sin (\frac{2 π ( t + 101.75 )}{365}) = 230

Divide both sides by

387

387 sin (\frac{2 π ( t + 101.75 )}{365}) = 230

Divide both sides by

387

\frac{387 sin ( \frac{2 π ( t + 101.75 )}{365} )}{387} = \frac{230}{387}

Simplify

sin (\frac{2 π ( t + 101.75 )}{365}) = \frac{230}{387}

sin (\frac{2 π ( t + 101.75 )}{365}) = \frac{230}{387}

Apply trig inverse properties

sin (\frac{2 π ( t + 101.75 )}{365}) = \frac{230}{387}

General solutions for

sin (\frac{2 π ( t + 101.75 )}{365}) = \frac{230}{387}

sin (x) = a \Rightarrow x = arcsin (a) + 2 πn, x = π - arcsin (a) + 2 πn

\frac{2 π ( t + 101.75 )}{365} = arcsin (\frac{230}{387}) + 2 πn, \frac{2 π ( t + 101.75 )}{365} = π - arcsin (\frac{230}{387}) + 2 πn

\frac{2 π ( t + 101.75 )}{365} = arcsin (\frac{230}{387}) + 2 πn, \frac{2 π ( t + 101.75 )}{365} = π - arcsin (\frac{230}{387}) + 2 πn

Solve

\frac{2 π ( t + 101.75 )}{365} = arcsin (\frac{230}{387}) + 2 πn : t = \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n - 101.75

\frac{2 π ( t + 101.75 )}{365} = arcsin (\frac{230}{387}) + 2 πn

Multiply both sides by

365

\frac{2 π ( t + 101.75 )}{365} = arcsin (\frac{230}{387}) + 2 πn

Multiply both sides by

365

\frac{365 \cdot 2 π ( t + 101.75 )}{365} = 365 arcsin (\frac{230}{387}) + 365 \cdot 2 πn

Simplify

\frac{365 \cdot 2 π ( t + 101.75 )}{365} = 365 arcsin (\frac{230}{387}) + 365 \cdot 2 πn

Simplify

\frac{365 \cdot 2 π ( t + 101.75 )}{365} : 2 π (t + 101.75)

\frac{365 \cdot 2 π ( t + 101.75 )}{365}

Multiply the numbers:

365 \cdot 2 = 730

= \frac{730 π ( t + 101.75 )}{365}

Divide the numbers:

\frac{730}{365} = 2

= 2 π (t + 101.75)

Simplify

365 arcsin (\frac{230}{387}) + 365 \cdot 2 πn : 365 arcsin (\frac{230}{387}) + 730 πn

365 arcsin (\frac{230}{387}) + 365 \cdot 2 πn

Multiply the numbers:

365 \cdot 2 = 730

= 365 arcsin (\frac{230}{387}) + 730 πn

2 π (t + 101.75) = 365 arcsin (\frac{230}{387}) + 730 πn

2 π (t + 101.75) = 365 arcsin (\frac{230}{387}) + 730 πn

2 π (t + 101.75) = 365 arcsin (\frac{230}{387}) + 730 πn

Divide both sides by

2 π

2 π (t + 101.75) = 365 arcsin (\frac{230}{387}) + 730 πn

Divide both sides by

2 π

\frac{2 π ( t + 101.75 )}{2 π} = \frac{365 arcsin ( \frac{230}{387} )}{2 π} + \frac{730 πn}{2 π}

Simplify

\frac{2 π ( t + 101.75 )}{2 π} = \frac{365 arcsin ( \frac{230}{387} )}{2 π} + \frac{730 πn}{2 π}

Simplify

\frac{2 π ( t + 101.75 )}{2 π} : t + 101.75

\frac{2 π ( t + 101.75 )}{2 π}

Divide the numbers:

\frac{2}{2} = 1

= \frac{π ( t + 101.75 )}{π}

Cancel the common factor:

π

= t + 101.75

Simplify

\frac{365 arcsin ( \frac{230}{387} )}{2 π} + \frac{730 πn}{2 π} : \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n

\frac{365 arcsin ( \frac{230}{387} )}{2 π} + \frac{730 πn}{2 π}

Cancel

\frac{730 πn}{2 π} : 365 n

\frac{730 πn}{2 π}

Cancel

\frac{730 πn}{2 π} : 365 n

\frac{730 πn}{2 π}

Divide the numbers:

\frac{730}{2} = 365

= \frac{365 πn}{π}

Cancel the common factor:

π

= 365 n

= 365 n

= \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n

t + 101.75 = \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n

t + 101.75 = \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n

t + 101.75 = \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n

Move

101.75

to the right side

t + 101.75 = \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n

Subtract

101.75

from both sides

t + 101.75 - 101.75 = \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n - 101.75

Simplify

t = \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n - 101.75

t = \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n - 101.75

Solve

\frac{2 π ( t + 101.75 )}{365} = π - arcsin (\frac{230}{387}) + 2 πn : t = \frac{365}{2} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n - 101.75

\frac{2 π ( t + 101.75 )}{365} = π - arcsin (\frac{230}{387}) + 2 πn

Multiply both sides by

365

\frac{2 π ( t + 101.75 )}{365} = π - arcsin (\frac{230}{387}) + 2 πn

Multiply both sides by

365

\frac{365 \cdot 2 π ( t + 101.75 )}{365} = 365 π - 365 arcsin (\frac{230}{387}) + 365 \cdot 2 πn

Simplify

\frac{365 \cdot 2 π ( t + 101.75 )}{365} = 365 π - 365 arcsin (\frac{230}{387}) + 365 \cdot 2 πn

Simplify

\frac{365 \cdot 2 π ( t + 101.75 )}{365} : 2 π (t + 101.75)

\frac{365 \cdot 2 π ( t + 101.75 )}{365}

Multiply the numbers:

365 \cdot 2 = 730

= \frac{730 π ( t + 101.75 )}{365}

Divide the numbers:

\frac{730}{365} = 2

= 2 π (t + 101.75)

Simplify

365 π - 365 arcsin (\frac{230}{387}) + 365 \cdot 2 πn : 365 π - 365 arcsin (\frac{230}{387}) + 730 πn

365 π - 365 arcsin (\frac{230}{387}) + 365 \cdot 2 πn

Multiply the numbers:

365 \cdot 2 = 730

= 365 π - 365 arcsin (\frac{230}{387}) + 730 πn

2 π (t + 101.75) = 365 π - 365 arcsin (\frac{230}{387}) + 730 πn

2 π (t + 101.75) = 365 π - 365 arcsin (\frac{230}{387}) + 730 πn

2 π (t + 101.75) = 365 π - 365 arcsin (\frac{230}{387}) + 730 πn

Divide both sides by

2 π

2 π (t + 101.75) = 365 π - 365 arcsin (\frac{230}{387}) + 730 πn

Divide both sides by

2 π

\frac{2 π ( t + 101.75 )}{2 π} = \frac{365 π}{2 π} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + \frac{730 πn}{2 π}

Simplify

\frac{2 π ( t + 101.75 )}{2 π} = \frac{365 π}{2 π} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + \frac{730 πn}{2 π}

Simplify

\frac{2 π ( t + 101.75 )}{2 π} : t + 101.75

\frac{2 π ( t + 101.75 )}{2 π}

Divide the numbers:

\frac{2}{2} = 1

= \frac{π ( t + 101.75 )}{π}

Cancel the common factor:

π

= t + 101.75

Simplify

\frac{365 π}{2 π} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + \frac{730 πn}{2 π} : \frac{365}{2} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n

\frac{365 π}{2 π} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + \frac{730 πn}{2 π}

Cancel

\frac{365 π}{2 π} : \frac{365}{2}

\frac{365 π}{2 π}

Cancel the common factor:

π

= \frac{365}{2}

= \frac{365}{2} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + \frac{730 πn}{2 π}

Cancel

\frac{730 πn}{2 π} : 365 n

\frac{730 πn}{2 π}

Cancel

\frac{730 πn}{2 π} : 365 n

\frac{730 πn}{2 π}

Divide the numbers:

\frac{730}{2} = 365

= \frac{365 πn}{π}

Cancel the common factor:

π

= 365 n

= 365 n

= \frac{365}{2} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n

t + 101.75 = \frac{365}{2} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n

t + 101.75 = \frac{365}{2} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n

t + 101.75 = \frac{365}{2} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n

Move

101.75

to the right side

t + 101.75 = \frac{365}{2} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n

Subtract

101.75

from both sides

t + 101.75 - 101.75 = \frac{365}{2} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n - 101.75

Simplify

t = \frac{365}{2} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n - 101.75

t = \frac{365}{2} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n - 101.75

t = \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n - 101.75, t = \frac{365}{2} - \frac{365 arcsin ( \frac{230}{387} )}{2 π} + 365 n - 101.75

Show solutions in decimal form

t = \frac{365 \cdot 0.63641 \dots}{2 π} + 365 n - 101.75, t = \frac{365}{2} - \frac{365 \cdot 0.63641 \dots}{2 π} + 365 n - 101.75

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