Precalculus Examples

Solve for x tan(x)+ square root of 3=0
Step 1
Subtract from both sides of the equation.
Step 2
Take the inverse tangent of both sides of the equation to extract from inside the tangent.
Step 3
Simplify the right side.
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Step 3.1
The exact value of is .
Step 4
The tangent function is negative in the second and fourth quadrants. To find the second solution, subtract the reference angle from to find the solution in the third quadrant.
Step 5
Simplify the expression to find the second solution.
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Step 5.1
Add to .
Step 5.2
The resulting angle of is positive and coterminal with .
Step 6
Find the period of .
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Step 6.1
The period of the function can be calculated using .
Step 6.2
Replace with in the formula for period.
Step 6.3
The absolute value is the distance between a number and zero. The distance between and is .
Step 6.4
Divide by .
Step 7
Add to every negative angle to get positive angles.
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Step 7.1
Add to to find the positive angle.
Step 7.2
To write as a fraction with a common denominator, multiply by .
Step 7.3
Combine fractions.
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Step 7.3.1
Combine and .
Step 7.3.2
Combine the numerators over the common denominator.
Step 7.4
Simplify the numerator.
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Step 7.4.1
Move to the left of .
Step 7.4.2
Subtract from .
Step 7.5
List the new angles.
Step 8
The period of the function is so values will repeat every radians in both directions.
, for any integer
Step 9
Consolidate the answers.
, for any integer
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