Precalculus Examples

Solve for t 3=8sin((2pi)/3t)
Step 1
Rewrite the equation as .
Step 2
Divide each term in by and simplify.
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Divide each term in by .
Simplify the left side.
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Cancel the common factor of .
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Cancel the common factor.
Divide by .
Step 3
Take the inverse sine of both sides of the equation to extract from inside the sine.
Step 4
Simplify the left side.
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Combine and .
Step 5
Simplify the right side.
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Evaluate .
Step 6
Multiply both sides of the equation by .
Step 7
Simplify both sides of the equation.
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Simplify the left side.
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Simplify .
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Cancel the common factor of .
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Cancel the common factor.
Rewrite the expression.
Cancel the common factor of .
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Factor out of .
Cancel the common factor.
Rewrite the expression.
Simplify the right side.
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Simplify .
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Multiply .
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Combine and .
Multiply by .
Replace with an approximation.
Multiply by .
Divide by .
Step 8
The sine function is positive in the first and second quadrants. To find the second solution, subtract the reference angle from to find the solution in the second quadrant.
Step 9
Solve for .
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Multiply both sides of the equation by .
Simplify both sides of the equation.
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Simplify the left side.
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Simplify .
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Cancel the common factor of .
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Cancel the common factor.
Rewrite the expression.
Cancel the common factor of .
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Factor out of .
Cancel the common factor.
Rewrite the expression.
Simplify the right side.
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Simplify .
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Subtract from .
Multiply .
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Combine and .
Multiply by .
Replace with an approximation.
Multiply by .
Divide by .
Step 10
Find the period of .
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The period of the function can be calculated using .
Replace with in the formula for period.
is approximately which is positive so remove the absolute value
Multiply the numerator by the reciprocal of the denominator.
Cancel the common factor of .
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Cancel the common factor.
Rewrite the expression.
Step 11
The period of the function is so values will repeat every radians in both directions.
, for any integer
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