Trigonometry Examples

Solve for ? sin(x/2)=1
Step 1
Take the inverse sine of both sides of the equation to extract from inside the sine.
Step 2
Simplify the right side.
Tap for more steps...
Step 2.1
The exact value of is .
Step 3
Since the expression on each side of the equation has the same denominator, the numerators must be equal.
Step 4
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 5
Solve for .
Tap for more steps...
Step 5.1
Multiply both sides of the equation by .
Step 5.2
Simplify both sides of the equation.
Tap for more steps...
Step 5.2.1
Simplify the left side.
Tap for more steps...
Step 5.2.1.1
Cancel the common factor of .
Tap for more steps...
Step 5.2.1.1.1
Cancel the common factor.
Step 5.2.1.1.2
Rewrite the expression.
Step 5.2.2
Simplify the right side.
Tap for more steps...
Step 5.2.2.1
Simplify .
Tap for more steps...
Step 5.2.2.1.1
To write as a fraction with a common denominator, multiply by .
Step 5.2.2.1.2
Simplify terms.
Tap for more steps...
Step 5.2.2.1.2.1
Combine and .
Step 5.2.2.1.2.2
Combine the numerators over the common denominator.
Step 5.2.2.1.2.3
Cancel the common factor of .
Tap for more steps...
Step 5.2.2.1.2.3.1
Cancel the common factor.
Step 5.2.2.1.2.3.2
Rewrite the expression.
Step 5.2.2.1.3
Move to the left of .
Step 5.2.2.1.4
Subtract from .
Step 6
Find the period of .
Tap for more steps...
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
is approximately which is positive so remove the absolute value
Step 6.4
Multiply the numerator by the reciprocal of the denominator.
Step 6.5
Multiply by .
Step 7
The period of the function is so values will repeat every radians in both directions.
, for any integer