# Trigonometry Examples

Find the Supplement pi/9
The supplement of is the angle that when added to forms a straight angle ( radians).
To write as a fraction with a common denominator, multiply by .
Write each expression with a common denominator of , by multiplying each by an appropriate factor of .
Combine.
Multiply by .
Combine the numerators over the common denominator.
Simplify the numerator.
Move to the left of .
Subtract from .